Gruta das Mercês

The Gruta das Mercês (identified as Gruta das Mercês I by geologists) is a cave located along the Canada das Mercês, situated in the civil parish of Feteira, municipality of Angra do Heroísmo, in the Portuguese archipelago of the Azores.

The cavern was created by volcanological forces that generated a lava tube, along a series of lava flows near the coast. It is approximately 69 metres (226 ft) long, 4.7 metres (15 ft) tall and 3.9 metres (13 ft) wide.[1]

References

  1. Inventário do Património Espeleológico dos Açores (in Portuguese), Angra do Heroísmo (Azores), Portugal: GESPEA-Grupo de Trabalho para o Estudo do Património Espeleológico dos Açores, archived from the original on 30 November 2012, retrieved 3 December 2009


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