Located in a beautiful in north-central Thailand, Sukhothai was the capital of Thailand for a couple hundred years. This is site is often overlooked by travelers, as few stop there on the way to Chiang Mai. The central area contains 21 temples enclosed by a moat. Its many temples showcase the unique Sukhothai style of decoration, which incorporates Khmer (Cambodian) and Sri Lankan influences. It’s a huge, huge site and takes a good day or two to see. Most of it is exposed to the sun, so bring sunscreen or you’ll get massively sunburned.
The world has many amazing historical sites, and even if you don’t make it to these, there are plenty more out there worth seeing. The more you know about the past, the more you can understand why people act the way they do in the present.