Ijen plateau or known as “Kawah Ijen” is highly recommended to mountain buffs and hikers. The Plateau was at one time a huge active crater, 134 sq km in area. Today, Ijen is a quiet but active volcano, and the landscape is dominated by the volcanic cones of Ijen (2,368 asl) and Merapi (2,800 asl) on the northeastern edge of the Plateau, and Raung (3,332 asl) on the southwest corner.
Mt. Rinjani forms the second highest volcanic peak in Indonesia (3726 m), one of tourist destination in Lombok and also part of celebrated” Ring of Fire”. There is a huge crater containing a large green crescent-shaped lake, segara anak, which is about six km across at its widest point. There is series of natural hot springs on on the north-eastern side of the caldera.