Visit the picturesque Thang Hen Lake, part of a unique lake system comprising 36 interconnected natural lakes nestled in a valley surrounded by karst mountains and forests. Located within the Non Nuoc Cao Bang Geopark, Thang Hen is the largest lake in the system and is known for its beautiful emerald-green water, which remarkably stays blue year-round.

Enjoy the tranquil atmosphere, take a leisurely walk along the shore, or hire a small boat trip to explore the lake and its scenic surroundings. It’s a peaceful natural escape often visited in conjunction with nearby Nui Thung Mountain.