El Cedral

While it's not as impressive as the other Mayan ruins along the Yucatan (like Tulum), the El Cedral ruins offer visitors a glimpse into the region's storied past at the very least. Don't expect to be overwhelmed by this site (which dates back to around 800 A.D. and is about the size of a small house), but do plan to make it a nice stop if you tour the island in an SUV rental. As one TripAdvisor traveler notes, "I would not recommend going to El Cedral if your time is limited. Fortunately for us, the weather was great, we enjoyed the drive throughout Cozumel in the Jeep."

While there are no on-site restaurants or shops, there are usually a few merchants selling souvenirs and refreshments. Unfortunately, travelers also say there's a small fee to use the bathroom. The ruin is open every day, from sun up to sun down.