Ancient Ruins in Thailand

These ruins date back to 1100 A.D. They were established by Cambodians and represent a giant calendar. There are six doors and when the sun can be seen through all six doors, it is the first day of spring or the first day of fall. Although Thailand is predominantly Buddhist, the ruins were erected by people who practiced Hinduism.
If you click on the last photo and enlarge it, you will see Bob and Carol.