Situated on the south-west side of Ha Long Bay, Ba Ham Lake is found on Dau Be Island (Calf Head Island) in Lan Ha Bay – Catba Vietnam. This island is part of the range of islands at the farthest end of Ha Long Bay, bordering the immense zone Long Chau Sea. Ba Ham Lake is situated in the middle of a narrow, rectangular area, with the all four sides enclosed by vertical cliffs.
The lake is a system comprising three wide and round pits, linked together by a narrow and meandering tunnel. Stalactites hang from the ceiling in a myriad of strange, coloured forms. The silence is disturbed only by the sounds of the boat’s oars. On the island are many species of plants such as orchids, Benjamin figs, banyans and cycads, which blossom throughout the year. It is also the home of yellow-haired monkeys, birds, flying squirrels and bats. Under the deep blue surface of the water are the animated lives of shrimp and fish.