Ko Pha Ngan is located in the Gulf of Thailand and is the premier backpacking destination in Southeast Asia (for good or ill). Tourists started discovering this area in the 1980’s, and due to the fame of the Full Moon Parties, it has been popular ever since. There are tons of beautiful beaches, but be prepared for a lot of partying at this destination. You can escape the madness that is Haat Rin (location of the Full Moon Party), and head to the northern or eastern beaches on the island. They tend to be a lot more low-key and relaxed than busy Haat Rin.