Wikipedia
Kambalny
Kambalny is a stratovolcano located in the southern part of Kamchatka Peninsula, Russia. It consists of two cones, the western one collapsed about 6,300 years ago. Three large sector collapses on the volcano had a total volume of 5-10 cubic km, which is the largest known Holocene collapse in Kamchatka. Kambalny has five cinder cones on its slopes.