Cambodia has 7 national parks offering opportunities for a variety of wildlife watching, birdwatching, snorkelling, fishing, swimming and walking. Ream National Park is a coastal park with a river, estuary, mountains, jungles, beaches, islands, mangrove forests and coral reefs. The park offers snorkelling, boat trips and jungle walks with great views and wildlife, including monkeys and over 150 species of bird, as well as a chance to enjoy deserted beaches and pristine sites. Another coastal park, Kep National Park is in a range of coastal hills offering walking trails and great views across islands of the vast Vietnamese marine reserve in Kiên Giang. Phnom Kulen National Park contains the most sacred mountain in Cambodia surrounded by thick jungle, waterfalls, ancient carvings and temples.