Chiang Mai Zoo Aquarium, the biggest and largest under water world in Asia. August 1, 2008. Central Airport Plaza with Marine Scape (Thailand) Co., Ltd with Chiang Mai Zoo present Chiang Mai Zoo Aquarium that will grand opening in October, 2008 with 10 Square rai and 11203 Square maters with parking space 2782 square maters with lots of under sea life and under water life.