Yowie
Google
Excellent archeological UNESCO site, well worth a visit. I had a cab take me out there from Nong Khai and wait, whilst I walked around by myself (organised by my hostel). The taxi was 1800 Baht flat fee for one person, or 2000 for three people (negotiable). I left at 9am and arrived back in Nong Khai by 1:30pm. The taxi was definitely worth the money. 400 baht p/h for transport and a driver is standard, with fuel included. Mr Winai also drove me to Udon Thani airport. He’s reliable and punctual, but doesn’t speak English.
I would not recommend going by scooter as it is too far (60km and about a 2 hr ride), and online maps will probably not work out there.
The site opens at 8:30, and I am glad I got there in the morning. This is not a place to visit on a really hot day (over 35), or in the afternoon. It is a not a busy tourist site.
The walk around is easy (some stairs), but not wheelchair accessible. Kids over 5 would be fine. Plenty of signage and staff around, and you get a map with your 100 baht entry fee. Give yourself 2-3 hours, more if you want to go to the viewing platform, or walk the entire park.
The little restaurant on the side of the carpark has noodles for 50 baht (with an English menu), which is where I stopped and had a nice lunch after the walk.