Karangan
Karangan lies in eastern Borneo, near the western end of the Mangkalihat peninsula. The Karangan River flows through the area toward Sangkulirang Bay, opening a route from inland country to the sea. Nearby rises the Sangkulirang-Mangkalihat karst, a landscape of limestone hills and caves. Rivers cut through and around these formations, gathering water from the forested interior before reaching the bays and coastal lowlands of the island's eastern shore.