Thailand is a veritable mishmash of cultures, a crossroads where Indian, Khmer, Chinese, European, and Thai histories collide. This becomes most apparent in the architectural whimsy seen in its grandest structures. No trip to Thailand is complete without a visit to the Grand Palace, Wat Phra Kaew, and Wat Po.
Note that strict dress codes apply to visiting these sites, so be sure to wear appropriate attire; remember, shoes must be removed in places of worship and you won't be allowed into any royal or religious site if you're exposing your shoulders or dressed in skirts/shorts above the calf.