In the fourth quarter of 2019, Siam Park City was rebranded as Siam Amazing Park, although locals still refer to it by its original name. Siam Park City is not only the first park opened in Thailand, it is also the longest-running park in the country. The park now has two million visitors a year and has some of the largest rides in the region. The park began with a water park and a few rides, but it was later expanded and the slogan was changed to 'World of Eternal Fun and Happiness'. Siam Park City was opened on 19 November 1980 under the name of 'Suansiam' as the first water park in Thailand and the only man-made beach in Bangkok. The park was constructed by a group of Thai elites and later established by the real-estate developer Chaiwat Luangamornlert. The amusement park contains around 40 rides, including Vortex, one of the largest suspended roller-coasters and Giant Drop, a free-fall ride. The water park includes seven attractions, including a 13,600-square-metre wave pool certified as the world's largest by the Guinness World Records since 2009. The park is spread over 100 acres, divided into a water park and an amusement park. Siam Park City is an amusement park in Khan Na Yao District of Bangkok. Located near Bangkok's Suvarnabhumi Airport, it contains attractions such as Southeast Asia's first suspended looping coaster with five inversions, a large wave pool, and seven-story slides

It was founded in November 1980 and remains the oldest amusement and water park complex in Southeast Asia. Siam Amazing Park ( Thai: สยามอะเมซิ่งพาร์ค), more commonly known as Siam Park City or Suansiam ( สวนสยาม, RTGS: Suan Sayam, pronounced ), is an amusement and water park located in the Khan Na Yao district of Bangkok, Thailand.

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