Lake Ranau (Indonesian: Danau Ranau) is a lake in Lampung, Indonesia. It is located at 4°51?45?S 103°55?50?E? / ?4.8625°S 103.93056°E? / -4.8625; 103.93056. Ranau Lake is located in Banding Agung district, 125 Km from Baturaja, the capital of Oku Regency. Ranau is an 8 x 13 km caldera partially filled by the crescent-shaped Ranau Lake.
Beneath the Mount Seminung, there is a source of natural warm water. A morphologically young post-caldera strata volcano, Mount Semuning, was constructed within the SE side of the caldera to a height of more than 1600 m above the caldera lake surface.
For most people, Ranau Lake is the climax of a visit to the western highlands of South Sumatra. This blinking Crater Lake is located in the old caldera of Mount Seminung (1340 meters), an active volcano on the border of Lampung province. The climate in these highlands is nice cool and the remote location offers wealthy vegetation, crystal clear water and beautiful trips to a nearby fall, hot source and an island in the lake.
Furthermore, rice is grown, as well as juicy pineapples, bananas and avocado’s, which are sold very cheap locally. The lake is full of fish, which are grilled in small restaurants at the lakeside. There’s much to do around the lake. Other trip, on the lake by a hired boat, takes us to a hot water source at the foot of Mount Seminung.
The source now is separated from the lake by a wall, so the hot and the cold water can’t mix anymore. Across the hot water source is a small island, which is known as Marisa Island. A local legend tells about a handsome young prince, Putri Aisah, which had two lovers, Sipahit Lidah (Bitter Tongue) and Simata Empat (Four Eyes).
Sources: Wikipedia, indonesia-tourism