How we checked licences. Mexico's Registro Nacional de Turismo (RNT) is the public catalogue of tourism service providers, regulated by the federal tourism ministry (SECTUR) and operated with the states; article 48 of the Ley General de Turismo makes registration mandatory for tourism service providers, within 30 days of starting operations. We looked for an RNT number in the footer, about, contact, terms and legal pages of each operator's own website. A missing number means we could not see one, not that the company is unregistered. Dive centres' PADI ratings are a separate, private credential. 0 of 14 publish one — shown above. Amigo Tours, EKINOX Tours, Cenotes El Retoño, Extreme Adventuring Cancun, Cenotes Kin-Ha, Lighthouse Tours, Rio Secreto, Cancun Adventures, Deep Dive Mexico, Xico Dive Center, Mexico Kan Tours, Xaman-Ha Connections, Tulum Underground, Edventure Tours: real, reviewed operators that don't list a number publicly; we mark them unverified rather than omit them. We excluded aggregators and booking portals, which are not operators.
Left out. We list companies that run cenote trips under their own name and website. Resellers, booking portals and transfer companies were left out, as were Maps profiles whose website is a Facebook, Viator or blank page, agencies whose own site showed no cenote trip, a Mexico City-based reseller, and two well-reviewed cenote parks and a Puerto Morelos dive centre whose websites could not be read when we checked. Park-group tours (the theme-park cenote circuits) are compared on a separate page. Nobody sells an official ticket for the cenotes as a whole: each cenote is run by its own ejido, family or company.
Disclosure. Direct prices and ratings are from operators' own sites and public review platforms (checked October 27, 2026). Online prices, ratings and review counts are GetYourGuide's, captured October 27, 2026; booking through those links may earn us a commission at no extra cost to you, and it never changes the order. Always confirm current price, schedule and what's included with the operator before booking. Machine-readable version (JSON)