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Last reviewed · 30 July 2026
Photos on ViatorWe only publish the operator's own images and live prices for this exact excursion.
What to expect
Wade and swim through a lit section of the world's largest flooded cave network with a geologist, in a reserve that limits daily numbers and bans sunscreen inside.
Half-flooded cave system + geologist guide Departures run from Riviera Maya, and the whole experience takes about 5 hours — enough to fit it into a single day of a wider Riviera Maya itinerary.
Location & duration
- Where
- Riviera Maya
- Region
- Quintana Roo, Mexico
- Duration
- 5 hours
Good to know
- ◆Wetsuit and helmet
- ◆Limited group size
- ◆Reserve conservation fee
- ◆Photos available
Questions travellers ask
- Where does the Rio Secreto underground river and crystal caves take place?
- The experience runs in Riviera Maya (Quintana Roo, Mexico). Exact meeting point and pick-up options are confirmed by the operator when you book.
- How long does it last?
- Around 5 hours, including transfers and free time where applicable.
- Is it worth booking in advance?
- Yes. It is one of the most reviewed excursions in Riviera Maya (6,800 reviews, 4.9/5) and sells out in high season. Booking is free to cancel up to 24 hours before.
- Can I cancel or pay later?
- Free cancellation up to 24 hours before the start time, with reserve-now-pay-later on most dates and instant confirmation.