Until now, most of the land area is forests. Having been through a long geological history, Mentawai has several endemic species that are protected, and there are 20 endemic species that live in these islands. Four of which were Simakobu (Simias concolor), dwarf gibbon (Hylobates klossii), Mentawai leaf monkey (Presbytis potenziani), monkey Mentawai (Macaca Siberut).
To protect the existence of these endemic species, half of the area has been designated as the Mentawai Siberut National Park. The presence of National Park and the lush rain forest on the islands directly support a variety of life on the beach and the sea, including the tourism sector. Many tourists who come to enjoy the many attractions in the coastal areas are also very impressed by the originality Mentawai forests.
Mentawai Islands have a coastline 758 km. The main potential of the waves of the Mentawai Islands is rolling and very suitable to be turned into surfing. Mentawai Islands potential of this began to unfold when in the mid 90's, some surfers from Australia to visit and see the waves that they never thought was in the Mentawai. The surfer was eventually disseminating findings and some of them even founded several beach resorts to serve foreign tourists who want to surf in the Mentawai.
Geographical position of the Mentawai Islands off the coast of West Sumatra distinct benefits for tourism development of extreme sports. Located directly Ocean Facing the Mentawai Islands granted consistent waves all year. Between April to August which coincided with summer holidays in Europe is the best time for surfing.
In that season, Mentawai waves can reach six meters tall and this is the most sought after by surfers . Mentawai Islands has recorded a 400 point often made surfing locations by the surfer. 400 points from surfing, has 23 points including international waves. The area is spread among others in the Nyang-Nyang, Coral Bajat, Karoniki, Pananggelat and Mainuk (Siberut Island), Katiet Basua (Sipoira Island) and North Pagai (Sikakap Island).
The recognition gave by the international world of the waves can be seen from the Mentawai surfing event held in these islands. Each year, Mentawai appointed as the executor Surfing World Championship Series or World Series is scheduled Surfing Water every month in August.
To ensure the comfort and safety of the surfers, local governments held several supporting facilities. Facilities supporting the most significant are the establishment of 60 exclusive surf spots scattered in various corners of the island. Beside an exclusive set surf spot, the government also established beach resorts and various other support facilities for the convenience of tourists. Among the resort, include Macaroni Silabu Island, Kandui in Nyang Nyang Island, Mentawai Saraina City, and Alloyta in Simakakang Island, and Surfing Ground in Katiet. Currently, Mentawai can be gained access through two channels of the sea and plane, Mentawai can be achieved by fast boat for four hours or ship selama10 hours.