Ba Mun covers an area of about 1,800 hectares with diverse flora and fauna including rare and valuable species. The most prominent plants are Tram Do (Syzygium zeylanicum), as well as Lim (Erythrophleum fordii), Sen (Madhuca pasquieri) and Tau (Vatica fleuryana Tardieu).
On Ba Mun Island, there are seven large streams with unique names such as O Lon To (big pigsty) and O Lon Con (small pigsty), as well as Mieu Danh, Van Lau, Cao Lo streams, and Che flume. The water runs all year round and is very clean thanks to large coverage of the forest. This is a valuable source of fresh water amidst the vast sea.
Travelling to Ba Mun, tourists can explore on their own, following some natural trails on the island or patrol routes serving forest management. It takes at least 3 days to complete a tour of Ba Mun Island and 5 hours if going around the island by motor-boat. The island has a wildlife rescue centre belonging to the Bai Tu Long National Park. Tourists can contact the centre in case they need any support.
Ba Mun Island is a schist island belonging to the Minh Chau Commune, Van Ðon District. It stretches out parallel to Quan Lan Island, separated by the Ðoi Gate that runs in a north-east direction. It has the other name, Cao Lo Island.