A cenote is a natural freshwater sinkhole formed when limestone bedrock collapses to reveal a cool, crystal-clear pool — sacred to the Maya and unique to the Yucatan. Swimming in one is the most refreshing thing to do in Cancun after a morning at the ruins, and many tours bundle the two.
Cenote Ik Kil near Chichén Itzá is the most visited, while Gran Cenote and Dos Ojos near Tulum offer the best snorkelling. For a deeper dive, read our Cancun day trips guide covering ruins, cenotes and islands, or browse every day trip we offer worldwide.