The highest point in Riau Islands is Mount Daik with a height of 1,165 meters (3,822 ft), which is located on Lingga Island. Most of the area on Lingga Island is hilly. The Lingga area is generally in the form of an area with a fairly high slope, where there are as many as 76.92 percent of the area which has a slope of more than 15%, while the plain area (slope less than 2%) only encompasses of 3.49 ha or 3.14 percent of the total area.