Last weekend we did a trip up to King Naresuan Movie Studio. en.wikipedia.org/wiki/King_Naresuan_(film)
Its set on 700 acres in Kanchanaburi.
It seems to be getting a bit run down, but was an interesting day anyway. Very little information is in English, and the English that is there is a very poor translation.
Entrance fees were:
Children 50 Baht.
Adults 100 Baht.
Foreigners 200 Baht.