Recursive islands and lakes

A recursive island or lake is an island or lake that is itself within an island or lake.[1]

Recursive islands

Islands in lakes
Main article: Lake island
Idjwi, in the central-southern region of Lake Kivu
Island In lake CountrySize (km2) Coordinates notes
Manitoulin Island Lake Michigan–Huron Canada2,76645°39′07.8″N 82°06′32.4″WLargest lake island in the world[1][2]
René-Levasseur Island Manicouagan Reservoir Canada2,020 51°23′50″N 68°41′30″W The island is technically artificial as the lake it is in was made by flooding a smaller existing lake due to the creation of the Daniel-Johnson dam
Sääminginsalo Saimaa Finland1,090 61.9827°N 29.0815°E / 61.9827; 29.0815 If Sääminginsalo is considered an island, as it is separated from one side by an artificial canal (Raikuu canal).
Olkhon Island Lake Baikal Russia730 53°9′24″N 107°23′1″E
Isle Royale Lake Superior United States535 48°0′0″N 88°55′0″W Stated first order parent island to the now debunked moose boulder myth
Ukerewe Island Lake Victoria Tanzania530 2°1′45.48″S 33°0′35.27″E
St. Joseph Island Lake Michigan–Huron Canada365 46°13′11″N 83°56′47″W
Drummond Island Lake Michigan–Huron United States347 46°0′0″N 83°40′0″W
Idjwi Lake Kivu DR Congo340 2°9′57.07″S 29°3′21.93″E
Kotasaari Kallavesi Finland285 62.8811°N 28.0063°E / 62.8811; 28.0063 If Kotasaari is considered an island, as it is separated from one side by an artificial canal (Summa canal).
Ometepe Lake Nicaragua Nicaragua276 11°30′0″N 85°35′0″W Made of two conjoined volcanic islands
Zapatera Lake Nicaragua Nicaragua 11°43′48″N 85°49′12″W
Big island Great Slave Lake Canada About 200 61°07′44.6″N 116°45′23.9″W
Wizard Island Crater Lake United States 1.3 42°56′19″N 122°08′44″W Crater Lake itself is a caldera formed by the eruption of Mount Mazama; a series of smaller eruptions later formed cinder cones on the caldera floor, of which Wizard Island is the highest, and the only one now visible above the lake's surface.[3]

Islands in lakes on islands
Samosir is in the middle of Lake Toba.
Name In lake On island CountrySize (km2) Coordinates notes
Samosir Lake Toba Sumatra Indonesia 630 2° 35′ 0″ N, 98° 49′ 0″ E Largest island in a lake on an island.[1] Manmade from digging canal [note 1]
Gatter Island Lake Hazen Ellesmere Island Canada 0.2 81°55'04.8"N 69°05'34.8"W
Glover Island Grand Lake Newfoundland Canada 178 48° 46′ 52″ N, 57° 41′ 54″ W
Volcano Island[5] Lake Taal Luzon Philippines 26.1 14°00'44.0"N 120°59'06.6"E
Motutaiko Island Lake Taupo North Island New Zealand 0.11 38°51'17.3"S 175°56'36.4"E
Mou Waho Lake Wānaka South Island New Zealand 1.2 44°33'10.1"S 169°04'50.4"E
Pomona Island Lake Manapouri South Island New Zealand 2.6 45° 30′ 30″ S, 167° 28′ 30″ E
Unknown name West Lake Brownsea Island United Kingdom 0.0008 50°41'34.1"N 1°58'21.0"W
Belle Isle Windermere Great Britain United Kingdom 0.17 54° 21′ 43″ N, 2° 56′ 4″ W
Storgrynnan Vandöfjärden Fasta Åland Finland 0.12 60.2960°N 19.9200°E / 60.2960; 19.9200
unnamed island Senanayaka Samudra Sri Lanka Sri Lanka 0.02 7°11'59.7"N 81°31'10.2"E
Derrywarragh Island Lough Neagh Ireland United Kingdom and Republic of Ireland 0.56 54°30'57.3"N 6°34'11.1"W
Sveta Marija Veliko jezero Mljet Croatia 0.017 42°46'08.4"N 17°21'36.6"E
Pulau Loeha Lake Towuti Sulawesi Indonesia 12.5 2°46'21.6"S 121°32'50.7"E

Islands in lakes on islands in lakes

There are nearly 1,000 islands in lakes on islands in Finland.[6]

NameIn lakeOn islandIn lakeCountrySize (km2)coordinatesNotes
Kokkosaari[7] Kokkohauta Sääminginsalo Saimaa Finland 0.88 61.9889°N 29.2154°E / 61.9889; 29.2154 If Sääminginsalo is considered an island, as it is separated from one side by an artificial canal (Raikuu canal). Claimed by some to be the world largest island in a lake in an island in a lake. Another island, Suursaari (62.0912°N 28.9911°E / 62.0912; 28.9911) in Hanhijärvi, is also located in Sääminginsalo, and it is about half the size of Kokkosaari.
unnamed island Lake Chaunoy (Lac du Chaunoy)[8] René-Levasseur Island Manicouagan Reservoir Canada 0.44 51°33'05.1"N 68°49'07.5"W There exist more than 10 other islands in lake chaunoy, the largest of which is less than a tenth of the size of the one mentioned here
Treasure IslandLake MindemoyaManitoulin IslandLake Michigan–HuronCanada0.445°45′50″N 82°10′41″W
Kakawaie Island Lake Kagawong Manitoulin Island Lake Michigan–Huron 0.24 45°48'44.8"N 82°18'22.3"W
Ryan Island[9] Siskiwit Lake Isle Royale Lake Superior United States 0.141 48.0098831°N 88.7709104°W / 48.0098831; -88.7709104
unnamed island second lake Drummond Island Lake Michigan–Huron United States 46°03'02.4"N 83°35'54.8"W
unnamed island[10] Mackaysee Lake Chambers Island Green Bay, Lake Michigan United States 0.009 45°11'40.5"N 87°20'42.7"W
unnamed island Frith Lake Kelvin Island Lake Nipigon Canada 0.0013 49°52'28.8"N 88°40'52.8"W
Piiroonsaari[7]SaravesiKotasaariKallavesiFinland0.2262.8447°N 28.0766°E / 62.8447; 28.0766If Kotasaari is considered an island, as it is separated from one side by an artificial canal (Summa canal).
Suurisaari[7]OininkiÄitsaariSaimaaFinland0.1461.3159°N 28.6335°E / 61.3159; 28.6335
Ukonsaari[7]KulkemusPartalansaariPihlajavesi (Saimaa)Finland0.1261°40'08.5"N 28°23'43.1"E
unnamed island Lake Cancy René-Levasseur Island Manicouagan Reservoir Canada 0.011 51°33'20.7"N 68°50'51.5"W
unnamed island Lac des Pigamons Îlots Walcott Lake Mistassini Canada 0.0002 51°07'17.6"N 73°21'34.3"W
unnamed island unnamed lake Wilson island Great Slave Lake Canada 0.011 61°50'06.7"N 112°46'57.1"W
Raaskasaari Kylliönjärvi Viljakansaari Pihlajavesi (Saimaa) Finland 0.05 61°33′53.0″N 28°22′55.9″E
Unnamed island Unnamed lake Kållandsö Vänern Sweden 0.0027 58°41'52.4"N 13°11'18.1"E There is a second island in the lake, almost the exact same size
Ösjöholmen ÖsjönAmmerönRevsundssjönSweden0.00862.8659 15.1731
unnamed island unnamed lake Tynnelsö Mälaren Sweden 0.0005 59°25'01.2"N 17°04'43.5"E
unnamed island unnamed lake unnamed island Lake Kovdozero Russia 0.0162 66°45'23.1"N 31°58'37.4"E
unnamed island unnamed lake Shaganappie Island Wollaston Lake Canada 0.0066 58°22'21.8"N 102°57'50.7"W
unnamed island Calder Lake Malcolm Island Reindeer Lake Canada 0.0154 56.97325007459433, -102.13347264635638
unnamed island unnamed lake Ispatinow Island Cree Lake Canada 0.00019 57.46116967996479, -106.67961029816925
unnamed island unnamed lake Blanchet Island Great Slave Lake Canada 0.01 61.9944774884283, -112.51557309272108 Several small islands in this lake
unnamed island Vanooyen Lake Shakespeare Island Lake Nipigon Canada 0.0182 49.66001716952034, -88.40276688882633 There is a second, smaller island in this lake
unnamed island Margaret Lake Elk Island God's Lake Canada 0.00095 54.658766157284624, -94.17889380427248 Several small islands in this lake
unnamed island unnamed lake Ile Guillaume Couture Lac Mistassini Canada 0.0017 50.91693373523127, -73.62564379865375
unnamed island unnamed lake Ile Tchapahipane Lac Mistassini Canada 0.00125 51.07616979803798, -73.42363930566513
unnamed island unnamed lake Pie Island Lake Superior Canada 0.0086 48.23290515496794, -89.05716241120395 Two islands of similar size are in this lake
unnamed island Muir Lake St Ignace Island Lake Superior Canada 0.00325 48.807840372078104, -88.03425347977276
unnamed island Antler Lake St Ignace Island Lake Superior Canada 0.0041 48.81649037076106, -88.00151154593118 Two islands of similar size are in this lake
unnamed island Williamson Lake St Ignace Island Lake Superior Canada 0.00425 48.800997928703225, -88.02761140808781
unnamed island Molinski Lake Simpson Island Lake Superior Canada 0.01 48.82044934926026, -87.71418643468395
unnamed island Caribou Lake Simpson Island Lake Superior Canada 0.00465 48.764252479574736, -87.65916767767021
unnamed island Veronica Lake Slate Islands Lake Superior Canada 0.0065 48.65772574787964, -86.98979653852676
unnamed island Michi Lake Michipicoten Island Lake Superior Canada 0.0037 47.741115844897315, -85.90801381706514 There are 3 islands in total in this lake
unnamed island Channel Lake Michipicoten Island Lake Superior Canada 0.0084 47.730464694708296, -85.8001295558329 A second, smaller island is immediately to the west of this one.

Islands in lakes on islands in lakes on islands
Nameless isle within Victoria Island in Nunavut Territory in Canada.[11]
Name In lake On islandIn lake On island Country Size (km2) Coordinates Comment
Small islet Not specified Not specifiedNettilling Lake Baffin Island Canada 0.04 66.687361°N 70.479923°W / 66.687361; -70.479923 There are more islands in lakes on the 'level 2' island in Nettling Lake.
Small islet Not specified Not specifiedNot specified Victoria Island Canada 0.016 69.792259°N 108.240536°W / 69.792259; -108.240536 The sometime cited name Inception Island is not an official name
Small islet Aek Natonang (Locally Sidihoni Lake[12]) Samosir Lake Toba Sumatra Indonesia 0.013125 2°33'52.2"N 98°52'49.4"E Two islands, the largest of which is 175m by 75m
Small islet Unnamed lake Glover IslandGrand Lake Newfoundland Canada 0.0075 48.796848°N 57.65785°W / 48.796848; -57.65785 There are several (at least seven) other, even smaller, islets in the lake
Small islet Different Unnamed lake Glover IslandGrand Lake Newfoundland Canada 0.0023 48°43'07.6"N 57°46'22.8"W In a lake 11 km south west to the lake that contains the larger island. There are no other island in this islands lake
Small islet Unnamed lake unnamed island Meelpaeg Reservoir Newfoundland Canada 0.0001 48°18'43.5"N 56°30'48.0"W There are other 3 smaller islands in the same lake
unnamed island Arethusa Pool Mou Waho Lake Wānaka South Island New Zealand 0.000225 44°33'15.0"S 169°05'03.4"E There are 2 islands in this lake, both less than 25m across
Small islet Not specified Eilean Sùbhainn Loch Maree Great Britain United Kingdom 0.000225 57°41'23.9"N 5°29'08.8"W Two islets, each of which is 15m by 15m
Small islet Not specified Not Specified Kooryet Lake Banks Island (British Columbia) Canada about 0.0001 53°21'07.4"N 129°59'30.4"W A number of small islets, the largest of which is only 10m across
Unnamed island Name of lake unknown Samosir Lake Toba Sumatra Indonesia 0.0004 2°38'11.2"N 98°50'14.4"E Lake that island is on is believed to have a name but as of yet has not been identified

Until 2020,[13] Vulcan Point was an island that existed in Main Crater Lake on Volcano Island in Lake Taal on Luzon in the Philippines.[14] Main Crater Lake evaporated during the 2020 Taal Volcano eruption.[13]

Recursive lakes
Lake Alaotra region, Madagascar

Lakes on islands

Coordinate for this table need to be added

Name On island CountrySize (km2) Coordinates notes
Nettilling Lake Baffin Island Canada 5,542
Lake Alaotra Madagascar Madagascar 900
Laguna de Leche Cuba Cuba 67.2
Lough Neagh Island of Ireland Northern Ireland/United Kingdom 392
Lough Corrib Island of Ireland Republic of Ireland 176
Loch Lomond Great Britain Scotland/United Kingdom 71
Þingvallavatn Iceland Iceland 84
Lake Taupo North Island New Zealand 616
Lake Wakatipu South Island New Zealand 289
Lake Biwa Honshu Japan 670
Lake Toba Sumatra Indonesia 1130
Lake Ranau Sumatra Indonesia 126 4°51′45″S 103°55′50″E
Lake Singkarak Sumatra Indonesia 108 0° 37′ 12″ S, 100° 32′ 24″ E
Lake Towuti Sulawesi Indonesia 561 2° 45′ 0″ S, 121° 30′ 0″ E
Lake Poso Sulawesi Indonesia 323 1° 55′ 28″ S, 120° 37′ 0″ E
Lake Matano Sulawesi Indonesia 164 2° 29′ 7″ S, 121° 20′ 0″ E
Tourists on Laguna del Volcan Maderas on Ometepe Island in Lake Nicaragua

Lakes on islands in lakes
NameOn islandIn lakeCountrySize (km2)coordinatesnotes
Lake ManitouManitoulin IslandLake Michigan–HuronCanada10645° 46′ 42″ N, 81° 59′ 30″ W
Ylä-Enonvesi[7]SääminginsaloSaimaaFinland1262.0520°N 29.0032°E / 62.0520; 29.0032If Sääminginsalo is considered an island, as it is separated from one side by an artificial canal (Raikuu canal). Includes Lake Saarijärvi that forms its southern part.
Kulkemus[7]PartalansaariPihlajavesi (Saimaa)Finland5.861.6785°N 28.4035°E / 61.6785; 28.4035
Saajuu-Palovesi[7]PartalansaariPihlajavesi (Saimaa)Finland4.161.6985°N 28.3260°E / 61.6985; 28.3260
Saravesi[7]KotasaariKallavesiFinland4.162.84703°N 28.0811°E / 62.84703; 28.0811If Kotasaari is considered an island, as it is separated from one side by an artificial canal (Summa canal).
Oininki[7]ÄitsaariSaimaaFinland2.661.3144°N 28.6391°E / 61.3144; 28.6391
Malosenjärvi[7]ViljakansaariPihlajavesi (Saimaa)Finland1.461.5327°N 28.2697°E / 61.5327; 28.2697
Valkiajärvi[7]HurissaloSaimaaFinland1.461.5075°N 27.8248°E / 61.5075; 27.8248
Ruokojärvi[7]PartalansaariPihlajavesi (Saimaa)Finland1.361.6336°N 28.3941°E / 61.6336; 28.3941
Närtejärvi[7]ViljakansaariPihlajavesi (Saimaa)Finland1.261.5753°N 28.5189°E / 61.5753; 28.5189
Kylliönjärvi[7]ViljakansaariPihlajavesi (Saimaa)Finland1.161.5630°N 28.3830°E / 61.5630; 28.3830
Lapinjärvi[7]HurissaloSaimaaFinland1.161.4925°N 27.8083°E / 61.4925; 27.8083
Shara-Nur[15]Olkhon IslandLake BaikalRussia53°06'17.5"N 107°15'16.1"E
Siskiwit LakeIsle RoyaleLake SuperiorUnited States16.848°00′05″N 088°47′50″W
Lake Desor[16]Isle RoyaleLake SuperiorUnited States47.976825°N 88.986997°W / 47.976825; -88.986997
Lake Richie[17]Isle RoyaleLake SuperiorUnited States48.0438067°N 88.6953596°W / 48.0438067; -88.6953596
Lake MindemoyaManitoulin IslandLake Michigan–HuronCanada45.762°N 82.209°W / 45.762; -82.209
Lake KagawongManitoulin IslandLake Michigan–HuronCanada45°50'00.0"N 82°18'35.7"W
Little LakeWashington IslandLake MichiganUnited States0.1745.4100164°N 86.9413005°W / 45.4100164; -86.9413005
Lake WindigoStar IslandCass Lake (Minnesota)United States0.847.418611°N 94.570278°W / 47.418611; -94.570278
fox lagoonPelee islandLake ErieCanada0.0241°43'56.7"N 82°40'17.6"W
Lake HenryPelee islandLake ErieCanada0.34541°49'32.2"N 82°38'20.2"W
Laguna del Volcan Maderas[18]OmetepeLake NicaraguaNicaragua0.03411°26'42.0"N 85°30'37.6"W
Laguna de Zapatera[19]ZapateraLake NicaraguaNicaragua 0.1911°45'59.1"N 85°51'24.9"W
Antoniyevskoye LakeValaamLake LadogaRussia0.02861°23'17.5"N 30°59'47.9"E
Ozero LeshchevoValaamLake LadogaRussia0.2761°21'34.7"N 30°55'57.9"E
Lake GeneserathBeaver IslandLake Michigan–HuronUnited States245°35'54.9"N 85°32'23.0"W
ÖsjönAmmerönRevsundssjönSweden0,5862.86466 15.17249
IgelvikenFäringsöMälarenSweden0.4759.36477 17.70362
ÄndsjönFrösönStorsjönSweden0.3263.17618 14.57340
GråtjønnaRøssvassholmenRøssvatnetNorway0.0565.6961318 13.9964362

Lakes on islands in lakes on islands
Name On island In lake On island CountrySize (km2) Coordinates Notes
Unnamed Unnamed Nettilling Lake Baffin Island Canada 1.55 66.387392°N 69.644737°W / 66.387392; -69.644737
Unnamed Glover Island Grand Lake Newfoundland Canada 1.40 48.802486°N 57.661476°W / 48.802486; -57.661476
Arethusa Pool Mou Waho Lake Wānaka South Island New Zealand 0.05 ? 44.554064°S 169.083845°E / -44.554064; 169.083845
Unnamed lake unnamed island Mölnorträsk Fårö Sweden 0.00006 57°55'44.6"N 19°08'28.7"E Extremely small

Lakes on islands in lakes on islands in lakes
Name On island In lake On island In lake Country Size (km2) Coordinates Notes
Unnamed Not Specified Not Specified Not Specified Lake Yathkyed Canada 0.013 62°39′4.6″N 97°47′10.2″W First of its kind discovered

Hoaxes

Moose Boulder was claimed to exist in the seasonal pond of Moose Flats on Ryan Island in Siskiwit Lake on Isle Royale in Lake Superior in the United States,[20] making it a fourth order island. In 2020, it was shown not to exist.[21]

See also

Notes
  1. Was a peninsula until 1906 when a canal was dug, separating it from the mainland.[4]

References
  1. Records, Guinness World (August 28, 2018). 2019 Guinness World Records. pp. 40–41. ISBN 978-1-912286-43-0.
  2. January 2012, Natalie Wolchover 24. "World's Largest Island-in-a-lake-on-an-island-in-a-lake-on-an-island Seen on Google Earth". livescience.com.
  3. "Crater Lake, Oregon". NASA Earth Observatory.
  4. "Samosir Island - Everything you Need to Know about Samosir Island".
  5. "Volcano Island | volcano, Philippines". Encyclopedia Britannica.
  6. "Suomen saaristo- ja vesistömatkailusta" (PDF). valtioneuvosto.fi / Julkaisut.
  7. Shoreline - lakes (Ranta10), 2020. Finnish Environment Centre, ELY centres. Released under CC-BY-4.0.
  8. "Lac Du Chaunoy, Quebec Map:". geodata.us.
  9. "GNIS Detail - Ryan Island". geonames.usgs.gov.
  10. "Islands within Chambers Island's Lake Mackaysee Now Protected by Door County Land Trust". November 8, 2018.
  11. "Island in a Lake on an Island in a Lake on an Island". earthobservatory.nasa.gov. February 22, 2015. Retrieved March 13, 2020.
  12. "Aek Natonang Lake – A Sub-Lake of Pangururan". www.toba.indonesia-tourism.com. Retrieved August 12, 2020.
  13. Freedman, Andrew; Meko, Tim; Karklis, Laris (January 17, 2020). "Taal volcano's crater lake is nearly empty". Washington Post.
  14. "Some interesting islands and lakes". Topografisch Verbond Elbruz. Archived from the original on September 19, 2013. Retrieved February 1, 2014.
  15. "Shara-Nur lake". BaikalNature Tour Operator. May 11, 1975. Retrieved March 13, 2020.
  16. "GNIS Detail - Lake Desor". geonames.usgs.gov.
  17. "GNIS Detail - Lake Richie". geonames.usgs.gov.
  18. Valenzuela, Orlando. "Puerta laguna misteriosa [Door to mysterious lagoon]". El Nuevo Diario (in Spanish).
  19. "Global Volcanism Program | Zapatera". Smithsonian Institution | Global Volcanism Program.
  20. "Largest island on the largest lake in the world". Albert Lea Tribune. July 21, 2009. Retrieved March 13, 2020.
  21. Taub, Matthew (March 10, 2020). "The Intrepid Mother and Son Who Unraveled a Geographic Hoax". Atlas Obscura.
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