Mountain Peaks to explore in East Kalimantan
East Kalimantan is a province of Indonesia. Its territory comprises the eastern portion of Borneo. East Kalimantan has a unique natural site, Labuan Cermin Lake at Biduk-biduk district which features freshwater on top with about 2 meters thickness and seawater underneath it.
Skull Hill is an archaeological site hill located at Tampi Tampi Road, about 10 kilometres south of Semporna town. The hill is a volcanic rock-shelter site and a part of volcano mouth of 2 kilometres in diameter. It is surrounded by numerous isolated hills and mountains with most representing the sites of extinct volcanoes ranging from Pliocene to Quaternary in age. It is now one of the tourist attractions in Indonesia.