Lake Poso is an ancient lake located in the Poso District in Central Sulawesi, and is the third largest lake in Indonesia after Lake Toba and Lake Singkarak in Sumatra. The lake spans across an area of 32,000 hectares, and, with a depth of 515 meters at its deepest points, it is almost three times deeper than the Java Sea which has a mean depth of 151 meters only.

Lying just north of the Toraja highlands in South Sulawesi, Lake Poso is bordered by the Pendolo town at the south end of the lake and Tentena at the north, with several smaller villages scattered in between. The water of the lake pours in a river and out into the Tomini Bay by the town of Poso.

Silver and yellow eels criss-cross the lake together with two endemic species of fish. The center of the lake is crystal blue, outlined by a shade of green and bordered with soft white and golden sands. Rolling hills surround this enchanting lake, covered with stretches of bright, green rice fields, fragrant clove trees and tropical forests. Here are found anoas and babirusa (wild boar), endemic to Sulawesi.

There is also a strange phenomenon about Lake Poso. When night falls, a vivid, bright light is often seen glimmering beneath waters. Sometimes stationary, but sometimes moving rapidly from bank to bank across the lake. Some people attribute it to Indonesia’s counterpart of the mysterious “Nessie” in Scotland’s Loch Ness.

Since its first sighting, the tale has evolved from a light within the lake to a light that hovers above the lake and around the nearby hills and fields. This spectacle has been observed for many years, yet the source of the mysterious light has never been confirmed.