The entry fee for non-Thais is 100 baht. The park is well marked and relatively easy to navigate using the on site markers with the map provided in the English language brochure.
The legend of Nang U-sa and Tao Baros is the basis for the names of the structures.
The brochure dates man's arrival here as 3,000 to 2,500 years ago, while they then go on to date the structures at 14th to 16th century BE, which would be about 1,000 years ago. My question was why did they want to heft these big stones around in the first place. Some are, obviously, religiously inspired it seems. Whatever the case the park is certainly worth a visit if you are in this part of Isaan. Wear a cap and carry a bottle of water as the sun does beat down on you during the day