Live a wild experience in a SECRET RIVER plus tour!

Deep in the Riviera Maya, a network of underground rivers and limestone caverns cuts through the jungle, and this Secret River tour is built to get you into the middle of it. The day mixes bike riding through the forest and a cave, on-foot exploration of a string of caverns, and a swim-and-snorkel session in a crystal-clear underground river, so you come away having covered the jungle from the canopy down to its hidden waterways.

The adventure moves between above-ground and below-ground terrain, pedaling along jungle trails before ducking into a cave on two wheels, then dismounting to continue on foot through a sequence of caverns carved out over thousands of years. Inside, stalactites and stalagmites line the walls like shelves in an underground library, each formation built up drop by drop over an immense stretch of geological time. Rappelling is part of the mix as well, adding a vertical element to the underground portion of the day.

The centerpiece is the swim through the underground river itself, where the water runs so clear that the cave formations around you stay visible even as you glide through. Snorkeling here lets you take in the scale of the caverns from water level, looking up at ceilings and walls shaped by centuries of mineral deposits. After the physical exertion of biking, climbing, and swimming, the tour includes a regional lunch buffet back at the eco park, along with access to a designated room of peace for winding down before you head back.

This tour suits travelers who want an active day with some grit to it rather than a passive sightseeing outing. Because it combines biking, rappelling, cave trekking, and swimming in one itinerary, it works best for guests with at least a moderate level of physical fitness, and it stands apart from simpler cenote-swim tours by layering in the rappel and bike components alongside the underground river. It is not recommended for travelers with spinal injuries, poor cardiovascular health, or pregnant travelers, given the physical demands of rappelling and cycling through cave terrain.

All the equipment needed for each activity, including the rappel and bike gear, is provided, and a locker is available for securing your belongings while you move between activities. Admission to the eco park is included, along with the regional lunch buffet, so your main job is showing up ready to get wet and a little muddy. Cell phone use is not permitted during the activities for security reasons, and note that photos and videos of the experience, along with breakfast, are not included in the tour price.

Pickup logistics depend on where you're staying. If your hotel isn't on the tour operator's standard list, you're asked to provide your accommodation details in advance so a representative can reach out with the exact pickup time and location, which will be confirmed by email or text message ahead of the tour. Since infants are required to sit on an adult's lap, families traveling with very young children should factor that into their planning, and public transportation options are also available near the meeting area for those arranging their own way there.