Mayan Ruins, Tulúm, Yucatán, Mexico

One of the best things about the ruins at Tulúm was their compactness. They're only spread over a few acres and the site can be easily seen in a little over an hour. Also, their location next to a beautiful rocky shore–which was part of their reason for existence as a fortification against invasion–provided a gorgeous setting, and a cool breeze. And, when you're in the Yucatán, a cool breeze is rare and very welcome.