Some of the most important tourist destinations in the Gulf of Thailand are the islands of Ko Samui and Ko Pha Ngan in Surat Thani Province , Pattaya in Chonburi Province , Cha-Am in Phetchaburi Province , Hua Hin in Prachuap Khiri Khan Province , and Ko Samet in Rayong Province .
Some of the most important tourist places in the Gulf of Thailand are the islands of Ko Samui and Ko Pha Ngan in Surat Thani province , Pattaya in Chonburi province , Cha-am in Phetchaburi Province , Hua Hin in Prachuap Khiri Khan Province , Ko Samet in Rayong Province , and Ko Chang in Trat Province Other websites .