High Quality Content by WIKIPEDIA articles! Calabozos is a Holocene caldera in central Chile`s Maule Region (7th Region). Part of the Chilean Andes` volcanic segment, it is considered a member of the Southern Volcanic Zone (SVZ), one of the three distinct volcanic belts of South America. This most active section of the Andes runs along central Chile`s western edge, and includes more than 70 of Chile`s stratovolcanoes and volcanic fields. Calabozos lies in an extremely remote area of poorly glaciated mountains.