Nothing complements the aromas of tequila and sunscreen like a little historical and geographic context. For instance, did you know that before Tulum became the cluster of resorts that it is today, it stood as one of the most important trading hubs in the Mayan civilization? And that it was the only Mayan city surrounded by defensive walls? No, no you didn’t. For $150 experts will drop this kind of knowledge and more on a guided archaeological tour that will take you to the nearby ruins of Xel-Ha. Or for $15, grab a guidebook and experience the ruins on your own. Just be sure to bring your swimsuit and tanning oil, because there’s a path leading directly to the water near El Castillo, a rock structure overlooking the ocean that doubled as a fortress and temple. Yeah, yeah, OK, the history lesson is over—you can go to the bar now.