It’s top list of Indonesian 6 Wonders of Nature..
Lake Toba
Lake Toba is the largest volcanic lake in the world. At 100 km long and 30 km wide, measuring 505 m at its deepest point, it is situated in the middle of the northern part of the Indonesian island of Sumatra. Surrounded by tall mountains, it cradles the large island of Samosir in its middle.Krakatau Volcanic Islands
Nestled between the large Indonesian islands of Java and Sumatra is the Krakatau Volcano National Park. In the fourth century, a single marine volcano stood at this site, but in 416 A.D., the caldera of the volcano collapsed. The remnants formed a new caldera, or volcanic feature formed by the collapse of land following an eruption, around 7 km in diameter, with the peak’s remnants becoming the three islands of Verlaten, Lang and Krakatau.
Carstensz Pyramid
Carstensz Pyramid, Indonesia, the highest peak in Oceania. Rising to over 5000 meters on the tropical island of New Guinea. It’s a steep granite wall with sharp good climbable rock. Komodo Island
Indonesia’s Komodo National Park includes the three larger islands Komodo, Rinca and Padar, as well as numerous smaller ones, for a total area of 1,817 square kilometers (603 square kilometers of it land). The national park was founded in 1980 to protect the Komodo dragon. Heart of Borneo Forest
The forests of the Heart of Borneo are some of the most biologically diverse habitats on Earth, possessing staggeringly high numbers of unique plant and flower. The Heart of Borneo’s forest area is 1 of the only 2 places on Earth where orang-utans, elephants and rhinoceros still co-exist and where forests are currently large enough to maintain viable populations.Bromo Mountain
The land is one of great variety and natural beauty. Inland, smouldering volcanic peaks soar upwards to heights of more than three thousand metres. The pre-dawn departure and trek across the mountain’s ‘sand sea’ to watch the sun rise at the crater rim has become a daily ritual.