Chã das Caldeiras
The Chã das Calderas ("Plain of the calderas"), sometimes abbreviated Chã ("Plain"), is a caldera on the island of Fogo, Cape Verde. With a diameter of  and open to the east, it is surrounded on the west by the bordeira, a mountainous wall which rises to . It was made by the eruption of Monte Armarelo, which was replaced by the smaller Pico do Fogo.