Hin Sam Wan

Hin Sam Wan, meaning Three Whale Rock, is a natural sandstone formation in Phu Sing Forest Park, Bueng Kan Province, northeastern Thailand. The site features three massive whale-shaped rocks estimated to be about 75 million years old, perched on a high cliff. It is notable for panoramic views over the Phu Wua forest, Mekong River and surrounding countryside, and is one of Bueng Kan's most photographed natural viewpoints.

Visitors can expect a forested hilltop accessed by a walking trail leading to three elongated sandstone outcrops resembling a family of whales. The rocks sit on the edge of a high cliff with open viewpoints overlooking dense forest, agricultural plains and the Mekong River valley. There are designated viewing platforms and photo points on and around the rocks, with forested surroundings and sandstone cliffs. The experience is primarily sightseeing, photography and short hiking.

The formation consists of Cretaceous sandstone estimated to be around 75 million years old, shaped by natural erosion into three whale-like masses. The area is part of Phu Sing Forest Park, conserved for its geological and forest heritage.

Locally known as Hin Sam Wan, the rocks are a well-known natural landmark in Bueng Kan and a symbol of the province's tourism identity, appreciated for their distinctive whale-like appearance and scenic forest setting.