DISCOVER a Unique Secret River with Plus EXPERIENCE in Bike route & Rappel

Beneath the jungle of the Riviera Maya lies a network of underground rivers lined with stalactites and stalagmites, and this tour combines a visit to one of them with an above-ground bike route and a rappel descent into the cave system. It is built for travelers who want more than a straightforward cavern walk, adding physical activity on both ends of the underground swim.

The day starts with hotel pickup in a sanitized van, followed by the roughly 15-minute drive to the nature reserve. After checking in, staff outfit each participant with a wetsuit, a helmet fitted with a flashlight, and special footwear suited to the cave terrain, along with a briefing on what to expect. The bike route comes first, carrying riders along jungle trails that the tour frames as a passage toward Xibalba, the Maya underworld, before the group arrives at the point where the rappel descent begins.

The rappel lowers participants down to the underground river itself, where a light and sound show is projected onto the surrounding rock formations as you enter the water. From there, the experience shifts to walking and swimming through roughly 600 meters of cave passage lined with stalactites and stalagmites, moving through crystal-clear water in near-total silence except for the group itself. After emerging from the cave system, there is time to unwind at the reserve, and the tour includes a light meal and a flavored drink to close out the visit.

Because it stacks three activities, a bike ride, a rappel, and an extended cave swim, this tour works best for travelers who already have a moderate level of physical fitness and are comfortable being in the water and in confined underground spaces for an extended stretch. It is a better match for adventure-minded visitors than for those seeking a passive sightseeing stop, and it is not recommended for pregnant travelers or anyone with spinal or cardiovascular conditions.

Equipment is largely taken care of on site: the tour provides the bike, rappel gear, snorkeling equipment, wetsuit, helmet with light, and special shoes, along with lockers and towels for before and after the activity, and transport is in an air-conditioned vehicle. Entrance to the dry route, where the projected light and sound show takes place, and the closing buffet with a flavored drink are also included. Travelers should budget separately for photographs taken during the tour, since these come at an extra cost, and for gratuities, which are not covered.

As with pickup for many Riviera Maya tours, if your hotel is not already on the operator's list you are asked to notify them in advance so a representative can confirm the correct pickup location and time, which will be sent by email or text since schedules vary by hotel. Since you will be swimming, changing into a wetsuit, and riding a bike outdoors, it is worth bringing a swimsuit to wear underneath the provided gear and a dry change of clothes for afterward, since a full change of scenery from wet cave swimming to a closing meal is built into the day.