Na Hang Lake

Na Hang Lake is a large reservoir formed by the Na Hang Hydropower Dam on the Gam River in Na Hang District, Tuyen Quang Province, northern Vietnam. Surrounded by limestone karst peaks, forested hills and submerged valleys within Na Hang Nature Reserve, it is often called Ha Long Bay on land. The lake is notable for its emerald water, 99 limestone mountains, waterfalls and Tay and Dao ethnic villages, and is explored mainly by boat tours.

Visitors can expect a vast emerald reservoir dotted with limestone karsts and forested islands, accessed almost exclusively by boat from Na Hang boat wharf. The setting is tranquil and natural, with clear water, steep karst cliffs, submerged forests, waterfalls pouring into the lake such as Khuoi Nhi, and small Tay and Dao villages along the shore. Trips involve sightseeing by motorboat, stops at waterfalls, caves and viewpoints like Pac Ta Mountain, and opportunities for photography and nature observation.

The lake was created by the construction of the Na Hang Hydropower Plant, also called Tuyen Quang Hydropower Plant, on the Gam River, completed in 2008. The dam impounded the river valley to form a reservoir of about 8,000 hectares, flooding former valley land and creating the present lake landscape within the Na Hang Nature Reserve area.

The lake and surrounding area is home to Tay, Dao and other ethnic groups. Traditional stilt houses, fishing practices, festivals and folklore, including legends associated with Pac Ta Mountain, form part of the cultural landscape experienced during boat tours and village visits.