The Ancient City is a park near Bangkok featuring small-scale replicas of buildings from across Thailand. It is a wonderful place to discover the basics of classical Thai and Khmer architecture without traveling the whole country. The park is large and very photogenic, with replicas placed around a series of islands and gardens. I first visited as a six-year-old in 1996, and I have been back about six times since. These days it is easy to reach, with the BTS extended to Samut Prakan and a taxi from Kheha station costing around 50 baht. Cycling is my favorite way to get around, but there is also a park bus, golf carts, and plenty of space to walk.

It is a good idea to visit Luang Prabang from the north of Thailand. The distance between Chiang Mai and Luang Prabang is only 750km. But due to a border crossing and bad road conditions, It can take up to 24 hours. 

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