Surat Thani (often in short Surat, Thai: สุราษฎร์ธานี) former name Chaiya Province is the largest of the southern provinces (changwat) of Thailand, on the western shore of the Gulf of Thailand. Surat Thani means City of Good People, the title given to the city by King Vajiravudh (Rama VI).
Ko Samui (or Koh Samui, Thai: เกาะสมุย, Thai pronunciation: [kɔ̀ʔ samǔj]), or often simply Samui as it is referred to by locals, is an island off the east coast of the Kra Isthmus in Thailand. It is located close to the mainland town of Surat Thani in Surat Thani Province. It is Thailand's third largest island after Phuket and Ko Chang, with an area of 228.7 km2 and a population of over 62,000 attracting 1.5 million tourists per year. Ko Samui has abundant natural resources, white sandy beaches, coral reefs and coconut trees. It is part of Mu Ko Samui.