Ca Mau national park (located in Ca Mau province) is recognized by Ramsar international convention – UNESCO as the 5th Ramsar site in Vietnam. The site has many advantages and potentials to develop tourism, especially ecotourism. However, the activities utilized to develop tourism in the site are not very considerable in comparison with its available potentials. This paper states the author’s viewpoint of the existing actualities, the exploitable potential, and suggests some feasible solutions for the development of sustainable ecotourism at Ramsar site Mui Ca Mau.