Tulum, Mexico at $359 RT

In Tulum, history doesn’t just sit in a museum—it sunbathes on a cliffside.

Between December and February, swap your snow boots for sandals and dive into Mayan ruins that come with a built-in ocean view (arguably the best real estate deal of the 13th century).

After all that temple-wandering, you'll want to chill out in a jaw-droppingly cool cenote or, you know, that lil' backyard pool—and then toast ancient civilization with a spicy coconut margarita—because history class never looked this good :-)