Cambodia is located on mainland Southeast Asia between Thailand to the west and north and Vietnam to the east. It shares a land border with Laos in the northeast. Cambodia has a sea coast on the Gulf of Thailand. The Dangrek Mountain range in the north and Cardamom Mountains in the southwest form natural boundaries. Principal physical features include the Tonle Sap lake and the Mekong and Bassac Rivers. Cambodia remains one of the most heavily forested countries in the region, although deforestation continues at an alarming rate.