http://www.reuters.com/places/thailand

Today, the Mah Boon Khrong Center has about 2000 shops, the biggest being a four story high Tokyu Department Store. Over 100,000 Bangkok locals and tourists visit MBK Bangkok each and every day. The Mah Boon Krong Center sells just about everything from intercontinental foods to apparel, accessories, and electronic products, all spread throughout eight various floors.
Mah Boon Krong Fight Night occurs on Wednesday evenings somewhere between the months of October to June. These evenings offer around 6 or seven Muay Thai fights per night. There's also stores that setup stalls to sell fight tools and also other Muay Thai items.
MBK Bangkok is alongside Chulalongkorn University in the Pathum Wan District in Bangkok, Thailand. It is close to the Siam Discovery, Siam Center and Siam Paragon and is on the corner of Phaya Thai Road and Rama I.
It is actually readily accessible through the Khlong Saen Saeb Express and also by the BTS Skytrain. If you need to utilize the BTS you have to arrive at the National Stadium Station by using the BTS Skytrain Silom Line. The MBK Center is directly attached to the station. If you want to visit Siam Paragon, you can take the same train, but get out the train station just before National Stadium Station, that is the Siam Station.
If you utilize the Klong Saen Saep Express Boat to get to Phaya Thai Road, you will need to exit at the Saphan Hua Chang Pier. After you arrive at the stop, MBK Bangkok will be a short stroll to your south on Phaya Thai Road.
Here's their official website http://www.mbk-center.co.th/en/