The park is well known for its vicinity near to Bangkok's Suvarnabhumi Airport and its complex contains some of the most outstanding attractions in Thailand such as Southeast Asia's first suspended looping coaster with 5 inversions, 7-stories water slides which were once among the world's tallest in the early 80s and the planet's largest wave pool.

Siam Park City, also known as Suansiam, is an amusement park in Khan Na Yao District of Bangkok, 20 minutes from Suvarnabhumi International Airport. The park is spread over 100 acres and divided into a water park and an amusement park. 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 amusement park offers a choice of almost 40 rides. Among all, many are certified world-class such as Vortex, one of the two largest suspended roller-coasters and Giant Drop, a free fall ride.

The park was constructed by a group of Thai elites and later well established by a well-known real-estate developer, Mr. Chaiwat Luangamornlert. The idea behind the development is to create an escape, but close to Bangkok.

Siam Park City was opened on 19 November 19, 1980 under the name of "Suansiam" as the first waterpark in Thailand and the only man-made beach in Bangkok.

The park started off with a water park and a handful of rides. The amusement park was later expanded and the slogan was changed to "World of Eternal Fun and Happiness". The park now has two million visitors a year from all over the world and has some of the largest rides in the region.

According to wikipedia