The Knowledge Park, located at the border of Burma, Laos and Thailand, was once famous for its opium production. It is a famous tourist attraction for a long time in Chiang Rai. Has a very interesting history Is a border between 3 countries: Thailand (Chiang Saen District), Myanmar (Tachilek) and Laos (Baa Kaew Subdistrict)
golden triangle
Province: Chiang Rai