IMPACT Arena

Impact Arena, Exhibition and Convention Center, Muang Thong Thani is a commercial complex consisting of an arena, convention centre and exhibition halls, located in Muang Thong Thani in Pak Kret District of Nonthaburi Province, a northern suburb of Bangkok, Thailand.

It has been considered as the second largest exhibition and convention venue in Asia with an indoor floor space of over 140,000 sqm. Its Challenger Hall is currently the world's largest column-free exhibition hall. The venue hosts over 490 events and welcomes over 15 million visitors each year.

Source: Wikipedia