– Caldeira forms a nature reserve incredibly rich in the endemic flora of the Azores. The giant crater is for sure one of the island’s major natural attractions. It rises up to 1,043m (3,422ft) from the sea level at Cabeço Gordo, the island’s highest point, with a crater diameter of about 2km.

– Its last eruption happened only a little bit more than 1,000 years ago. It covered more than 70% of the island with a pumice stone.