Sihanoukville, also known as "Kampong Som", is a coastal city in Cambodia and the capital of Sihanoukville Province, at the tip of an elevated peninsula in the country's south-west on the Gulf of Thailand. The city is flanked by an almost uninterrupted string of beaches along its entire coastline and coastal marshlands bordering the Ream National Park in the east. The city has one navigable river, the mangrove lined OuTrojak Jet running from Otres Pagoda to the sea at Otres. A number of thinly inhabited islands – under Sihanoukville's administration – are near the city, where in recent years moderate development has helped to attract a sizable portion of Asia's individual travelers, students, and backpackers. The city, which was named in honour of former king Norodom Sihanouk, had a population of around 89,800 people and approximately 66,700 in its urban center in 2008. Sihanoukville city encompasses the greater part of six communes of PreahSihanoukville Province. A relatively young city, it has evolved in parallel with the construction of the Sihanoukville Autonomous Port, which commenced in June 1955, as the country's gateway to direct and unrestricted international sea trade. Furthermore, KohRong is an island in the Sihanoukville Province of Cambodia. It’s known for its sandy coves and coral reefs, like those around KohRong Pier. Inland, the dense jungle terrain is dotted with coconut palms and waterfalls. In the south are Jewelorchids, a small zoo home to butterflies, snakes, and birds, and lively Police Beach, a party spot. High Point Rope Park has suspension bridges, rope walks and zip lines.