This December, Museum Siam has brought back its popular Thailand Museum Pass, kick-starting a drive to promote educational and heritage tourism. For B299, the one-year pass grants access to 63 museums nationwide, just over half of which are outside Bangkok, including Art in Paradise and MAIIAM Contemporary Art Museum in Chiang Mai, Doi Tung Royal Villa and Mae Fa Luang garden in Chiang Rai, the Peranakan Phuket Museum, Hat Yai’s Magic Museum and many more. The pass is available to both Thais and foreigners, and get this: the price is the same across the board. 
museumthailand.com/en/museumpass