
Ko Samet Ko Samet , Thai pronunciation : is one of the Eastern Seaboard Islands of Thailand . It is in the Gulf of Thailand off the coastline of the Thai province of Rayong , approximately 220 kilometres (140 mi) southeast of Bangkok . Ko Samet is part of the Phe Subdistrict of the Amphoe Mueang Rayong , the capital district, or Amphoe Mueang , of Rayong Province . Ko Samet is the largest and westernmost of a cluster of islands not far from the coast. Ko Samet is 6.5 kilometres (4.0 mi) south of mainland Rayong Province. Popular with foreign tourists and as a weekend getaway for residents of nearby Bangkok , most of the island (excluding the Na Dan area) is in the Khao Laem Ya–Mu Ko Samet National Park . In 1981, the Royal Forest Department declared the archipelago of Samet, along with nine other small islands, the headland of Khao Laem Ya, and the 11 kilometres (6....