Siam is a shopping district in the heart of Bangkok, the capital of Thailand. It is situated alongside a stretch of Rama I Road in the city's Pathum Wan District, from Pathum Wan Intersection to Chaloem Phao Junction, beyond which it meets the adjacent Ratchaprasong neighbourhood. The area is home to multiple large shopping malls, and, together with Ratchaprasong, forms what has been termed the city's central shopping district, functioning as the modern-day city centre.

The area is named for Siam Square, a low-rise retail area owned and developed by Chulalongkorn University, as well as several enclosed malls opposite it which all bear Siam as part of their names: Siam Discovery, Siam Center and Siam Paragon, the last of which replaced the Siam Inter-Continental Hotel in 2002. 

- Wikipedia