Mount Batur
Juni 2007
The historically active Mount Batur (Gunung Batur) is located at the center of two concentric calderas north west of Mount Agung, Bali, Indonesia. The south east side of the larger 10×13 km caldera contains a caldera lake. The inner 7.5-kilometer-wide caldera, which was formed during emplacement of the Bali (or Ubud) ignimbrite, has been dated at about 23,670 and 28,500 years ago (Wheller 1986, Sutawidjaja et al. 1992).
http://en.wikipedia.org/wiki/Mount_Batur