Cong Do Lagoon Ecological Area

     Cong Do Lagoon Ecological Area is a destination of route no.4, about 23 km from Tuan Chau International Marina and 18 km from Ha Long International Passenger Port. This area has a number of sea lakes and the 2 most typical ones are Ang Ca Bong  and Ang Cong Do. Ang Ca Bong covers an area of 01 hectare. The water is shallow with a lot of gobies. To go inside the sea lake, you have to climb over a cliff andwalk about 500m on a steep forest road. 
     Ang Cong Do covers an area of 0,5 hectare. To go inside the sea lake, you can go through Cong Do cave (when the tide is low, about 1,5m) or climb over a 10m-high cliff. The sea lake’s bottom has a geological structure of sand, gravels and aquatic vegetation. 
     Besides outstanding values of biodiversity, geology – geomorphology, Cong Do Lagoon Ecological Area has unspoiled and peaceful landscape.