Located in the middle part of Java, the outskirts are home to two of the world's greatest religious monuments. First is Borobudur, a ninth century structure that is the world's oldest standing Buddhist monument; second is Prambanan, a Hindu temple complex that is of similar age and scope.
The Bohorok Orangutan Rehabilitation Center is arguably the most approachable place for encountering those gentle great apes in semi-wild conditions. The center is located in northern Sumatra.
Gunung Bromo is the most active volcano and popular name for the Tengger Caldera, the vast remnant of a supervolcano located in East Java. After the old volcano died out, a number of smaller volcanoes grew up inside its crater, creating one of the world's most unearthly landscapes.
These islands in the eastern tail of the Indonesia archipelago are home to the famed Komodo dragons, the world's largest lizards.
This volcano is located between the central Javanese cities of Yogyakarta and Solo, and has the dubious distinction of being arguably the most active volcano in the world.
Lake (Danau) Toba is located in the highlands of north Sumatra. It is a mammoth volcanic crater lake that has formed in the caldera of a supervolcano that erupted 74,000 years ago, with such force that it literally changed the world's climate.