Calder's Geo

Calders Geo is an inlet in the western cliffs of Esha Ness in Northmavine on the Mainland, Shetland, Scotland. A cave on the north side of the geo has been measured at more than one and a half times the size of "The Frozen Deep", a chamber in Reservoir Hole under Cheddar Gorge in Somerset, potentially making it the largest natural chamber in Britain.[1]

Calders Geo

Geologist Jonathan Swale used a laser range-finder to measure the interior of the cave, which is only accessible during calm seas. He claims that the structure is over 20 metres (66 ft) tall and has a floor area of around 5,600 square metres (60,000 sq ft).[2]

Esha Ness Lighthouse just south of the geo was designed by David Alan Stevenson and commissioned in 1929.[3]

References

"Esha Ness sea cave is 'largest in Britain'". BBC News. Retrieved 28 August 2014.
" 'Biggest cave' is Calders Geo in Shetland at Esha Ness". BBC News. Retrieved 28 August 2014.
"Eshaness". Northern Lighthouse Board. Retrieved 28 August 2014.

Northmavine
Populated places	Villages: Hillswick North Roe Ollaberry Sullom Other settlements Assater Braehoulland Braewick Burnside Eastwick Fethaland Gunnister Haggrister Hamnavoe Heylor Hogaland Housetter Isbister Mangaster Nibon North Gluss South Gluss Sandvoe Skelberry Stenness Swinister Tangwick Upper Urafirth Urafirth Ure Valladale Voe West Heogaland
Geography	Land features Esha Ness Hillswick Ness Tingon Coastal features: Calder's Geo Grind of the Navir Lang Ayre Mavis Grind Maritime features Ronas Voe St Magnus Bay Sullom Voe Yell Sound Islets: Dore Holm The Drongs Egilsay Skerry of Eshaness Muckle Ossa Isle of Nibon Isle of Niddister Ramna Stacks Isle of Stenness Uyea Isle of Westerhouse Hills: Ronas Hill Lochs: Johnnie Mann's Loch
History	Battle of Ronas Voe Gunnister Man
Buildings	List of listed buildings Esha Ness Lighthouse Tangwick Haa
People	Johnnie Notions Tom Anderson

Shetland
Inhabited islands	Mainland Bressay Burra East Burra West Burra Fair Isle Fetlar Foula Muckle Roe North Isles Out Skerries Papa Stour Trondra Unst Vaila Whalsay Yell
Other islands	Balta Bigga Brother Isle Colsay Hascosay Hildasay Lamba Linga, Bluemull Sound Linga, Busta Voe Linga (near Vementry) Linga, Vaila Sound Linga, Yell Sound Mousa Noss Oxna Papa Papa Little Samphrey South Havra St Ninian's Isle Uyea, Northmavine Uyea, Unst Vementry Ve Skerries West Linga
Towns and villages	Lerwick Aith Baltasound Brae Grutness Gutcher Haroldswick Hillswick Mid Yell Mossbank North Roe Ollaberry Quarff Scalloway Symbister Toft Ulsta Uyeasound Vidlin Voe, Delting Walls
Mainland Parishes	Delting Dunrossness Lerwick Nesting Northmavine Sandsting Tingwall Walls and Sandness
Insular Parishes	Bressay Fetlar Unst Yell
Maritime features	Balta Sound Bluemull Sound Burra Voe Busta Voe Calder's Geo Ronas Voe St Magnus Bay Sullom Voe West Voe of Sumburgh Yell Sound
Extreme points (N S E W)	Out Stack The Skerry, off Fair Isle Bound Skerry Waster Hoevda, Foula
Topics	Animal breeds Etymology History Prehistory

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