Climb Mount Rinjani
Mount Rinjani or Gunung Rinjani is an active volcano in Indonesia on the island of Lombok. It rises to 3,726 meters (12,224 ft), making it the second highest volcano in Indonesia.
On the top of the volcano is a 6 by 8.5 kilometer (3.7 by 5.3 mi) caldera, which is filled partially by the crater lake known as Segara Anak or Anak Laut (Child of the Sea) due to blue color of water lake as Laut (Sea). This lake is approximately 2,000 meters (6,600 ft) above sea level and estimated to be about 200 meters (660 ft) deep; the caldera also contains hot springs. Sasak tribe and Hindu people assume the lake and the mount are sacred and some religion activities are occasionally done in the two areas.