The last eruptions were in 1999 and 2000. Gunung Batur is an active volcano at the center of two concentric calderas northwest of Gunung Agung on the island of Bali. The southeastern side of the larger 10 x 13 km caldera contains a caldera lake, Lake Batur. Both the larger caldera and a smaller 7.5 km long caldera were formed by a collapse of the magma chamber, with the first major collapse occurring about 29,300 years ago and the second inner crater collapsing about 20,150 years ago.
My photo was taken during a trip in Wednesday 2013, when the entire volcano was, for once, not covered by cloud cover.