Siam park city is located in suburbs of Bangkok. The best way to get there is by Taxi. Just tell the driver "Siam park city". Usually, it costs about 300 baht.

First time I visited it in 1996. I was only 6 years old. We visited it about once a month. It is one of most excited experience, I remember from living in Thailand.

Check the site of the place: https://www.siamparkcity.com/en/main.php