The Golden Triangle is area where the borders of Laos, Thailand and Myanmar (Burma) meet. It is northeast of the city of Chiang Rai and still part of Chiang Rai province. It was a major opium growing area in Southeast Asia. It was a lawless area controlled by opium warlords. Nowadays it is a major tourist attraction. People come to visit the scenic spot where the borders meet which is on the Mekong River. It is possible to make a short boatride to Don Sao, an island in the Mekong River that is Laotian territory. There is not much to see except an souvenir market but you have been in Laos! The Hall of Opium is an excellent museum, one of the best in Thailand. It tells the story of the history of mankind and opium. It is very fascinating. Close to the Golden Triangle are the ruins of Chiang Saen which once was an important city in North Thailand. Ruined temples such as Wat Chedi Luang and Wat Pa Sak are worth a visit.