Mount Batur on Bali island of Indonesia is one of the most visited mountains by tourists. At the center, there is a 7.5-kilometer-wide caldera, which was formed during emplacement of the Bali ignimbrite (dated at about 23,670 and 28,500 years ago). At the SE wall of the inner caldera lies beneath the Lake Batur.
Photo credit: Jnpet.