Lan Ha Bay is located to the east of Cat Ba Island and adjacent to Ha Long Bay in the south. Lan Ha Bay covers an area of over 7000 hectares, including a fairly unspoiled archipelago with about 400 large and small islands, creating a huge, fanciful giant picture. In Lan Ha Bay, there is Cai Beo floating village, where more than 2 hundred households live on houses designed on buoys and the village has been studied by archaeologists at home and abroad. its existence for thousands of years