Balikpapan is a seaport city on the eastern coast of Borneo island, Indonesia in the East Kalimantan province, a resource-rich region well known for its timber, mining and petroleum export products. Two harbors, Semayang and Kariangau - ferry harbour, and the Sepinggan International Airport are the main transportation access to and from the city. The topography of the municipality of Balikpapan is generally hilly (85%), with only small areas of flatland (15%), particularly along the coast and surrounding the hilly areas. The hills are less than 100 meters higher than the adjacent valleys. The altitude of Balikpapan ranges from 0 to 80 meters above sea level. Prior to the oil boom, Balikpapan was an isolated Bugis fishing village. The etymology of Balikpapan's name (lit. balik is behind and papan is a plank) came from a folk story where a local king threw his newborn daughter into the sea to protect her against his enemies. The baby was tied beneath some planks, which were discovered by a fisherman.