Gruta do Zé Grande
The Gruta do Zé Grande is a cave located in Serretinha, situated in the civil parish of Feteira, municipality of Angra do Heroísmo, in the Portuguese archipelago of the Azores. It is a lava tube created from the lava flows that extended to the coast, 60 metres (200 ft) long, 3.8 metres (12 ft) wide and 2.1 metres (6.9 ft) tall.
Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).