Nowhere on earth has anything quite like the cenotes of Mexico. Scattered in their thousands across the flat limestone of the Yucatán Peninsula, these natural sinkholes open onto a hidden world of cool, crystal-clear fresh water and vast flooded caves — turquoise swimming holes ringed by jungle, cathedral caverns hung with stalactites, and secret pools the ancient Maya held sacred. The peninsula has an estimated 6,000-plus cenotes, and whether you want to swim, snorkel, dive or simply stand and stare, this guide explains what they are, where to find them and how to visit them well.
What is a cenote?
A cenote (from the Maya word dzonot, “sacred well”) is a natural pit or sinkhole that forms when the soft limestone bedrock collapses and exposes the groundwater flowing beneath. The Yucatán has almost no surface rivers; instead, rain filters down through the porous rock into one of the largest networks of underground rivers and flooded caves on the planet, and the cenotes are the windows into it. Many of them trace the famous “Ring of Cenotes”, a great arc that follows the rim of the Chicxulub crater left by the asteroid that ended the age of the dinosaurs. To the Maya, these pools were portals to Xibalba, the underworld, and a precious source of fresh water — sites of offerings, ceremony and, at some, sacrifice.
The three types of cenote
Cenotes come in three broad kinds, and knowing the difference helps you pick the right one for the day:
- Open cenotes — ground-level pools wide open to the sky, like jungle swimming holes. Sunny, easy and great for swimming (think Ik Kil).
- Semi-open cenotes — half cavern, half open air, often with a collapsed roof letting in shafts of light.
- Cave (closed) cenotes — underground chambers reached by stairs, dim and dramatic, lit only through holes in the ceiling (such as Suytun or Dzitnup).
Where the cenotes are: regions and base camps
Cenotes dot the whole peninsula, but most travellers base themselves in one of three towns. Tulum and the Riviera Maya hold the famous diving and snorkelling cenotes — busier and pricier, but spectacular. Valladolid, a colonial Pueblo Mágico halfway between Cancún and Mérida, is ringed by an astonishing concentration of cenotes and makes the best-value base. Mérida, the state capital, opens up the quieter inland cenotes, including the cart-and-horse rings of Cuzámá along the Chicxulub arc. Day-trippers also reach cenotes easily from Cancún and Playa del Carmen, while far to the south the turquoise lagoon of Bacalar is fed by cenotes of its own.
Swimming, snorkelling and diving
There is a cenote for every comfort level. Most open and semi-open cenotes are simply wonderful for swimming, often with a life jacket provided. Many of the clearer ones are superb for snorkelling, where you float over sunken stalactites and, in places like Gran Cenote, share the water with turtles and fish. And the Yucatán is one of the world’s great cave- and cavern-diving destinations: at sites such as Dos Ojos, certified divers explore drowned passages that wind for kilometres through the rock. You need no experience to enjoy a cenote — just a swimsuit and a sense of wonder.
Cenote etiquette and safety
Cenotes are living, fragile ecosystems and sacred places, so a few simple rules keep them beautiful. Shower off all sunscreen and insect repellent before you get in — the chemicals poison the water; use only reef-safe products, ideally applied long before, or none at all. Wear the life jacket when one is required (the water is often deep), do not touch or break the delicate stalactites, and take nothing but photographs. Bring cash, as most cenotes are cash-only with no ATM nearby, and go early — arriving at opening means clearer water, fewer people and, in the cave cenotes, the best light. Many sites provide lockers, showers and a restaurant; a small extra fee may apply for cameras.
The best cenotes in Mexico to visit
Ready to take the plunge? Here are our in-depth guides to some of the most beautiful cenotes in the country:
- Cenote Ik Kil — the iconic round, vine-draped cenote beside Chichén Itzá, the easiest swim to pair with the pyramids.
- Gran Cenote — near Tulum, the best all-rounder for snorkelling with turtles among caves and clear pools.
- Cenote Dos Ojos — the “Two Eyes”, a world-famous cavern- and cave-diving site with a magical Bat Cave.
- Cenote Suytun — near Valladolid, the most photographed cenote in Mexico thanks to its stone platform and beam of light.
- Cenote Dzitnup (X’keken & Samula) — twin cavern cenotes on one ticket, with stalactites, turquoise water and hanging roots.
- Cenote Sac-Aua — a quiet, community-run cenote near Valladolid with a rare island in its centre.
Frequently asked questions about cenotes
What is a cenote?
A cenote is a natural sinkhole formed when limestone collapses to reveal the fresh groundwater below. They are found across Mexico’s Yucatán Peninsula and were sacred to the Maya.
How many cenotes are there in Mexico?
The Yucatán Peninsula has an estimated 6,000 or more cenotes, and new ones are still being discovered.
Where are the best cenotes in Mexico?
Most are in the Yucatán Peninsula, with the richest concentrations around Tulum, Valladolid and Mérida. Valladolid is often the best-value base for cenote-hopping.
What are the different types of cenote?
There are three: open cenotes (exposed to the sky), semi-open cenotes (partly roofed), and cave or closed cenotes (underground chambers reached by stairs).
Can you swim in cenotes?
Yes — most cenotes are open for swimming and snorkelling, often with a life jacket provided, and some are world-class scuba-diving sites.
Why can’t you wear sunscreen in a cenote?
Sunscreen and insect repellent contain chemicals that harm the fragile cenote ecosystem, so you must shower them off before entering and use only reef-safe products.
How much does it cost to visit a cenote?
Entry typically ranges from about 100 to 400 pesos (roughly US $5–$20), depending on the cenote. Most are cash-only.
When is the best time to visit cenotes?
Arrive right at opening in the morning for clear water, fewer crowds and the best light in the cave cenotes. Weekdays are quieter than weekends.
