This is a genuine ecological reserve with a series of freshwater cenotes and lagoons set in tropical forest. Expect to spend about three to four hours walking forest trails, swimming in clear, cool sinkholes, and learning basic information about local plants and Taíno history from your guide. The water is refreshing rather than warm, the terrain can be slippery and muddy after rain, and you'll be in a small group of 8-12 people. It's low-key compared with the big catamaran or dune-buggy tours; the main attractions are the cenotes themselves and the chance to swim without crowds.
Best time is December through April when it's drier and the mosquitoes are less aggressive; avoid the heavy rainy season if you dislike mud. Expect to pay around $65-110 per person depending on whether you book a basic shared tour or a slightly smaller one with hotel pickup and lunch. One solid tip: choose the morning departure so you hit the trails before it gets hot and the water feels even colder. Skip the add-on horseback riding if it's offered; the horses look tired and the extra time is better spent in the water.
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