Cenotes in Mexico: Formation, Types, and the Most Beautiful Cenotes on the Riviera Maya

Cenotes in Mexico are among the natural phenomena that define a vacation on the Yucatán Peninsula. Erosion carves these crystal-clear freshwater pools into limestone. For many of our guests, they are among the most memorable experiences of their entire trip. But what exactly is a cenote, how do cenotes form, and what types exist? Here you’ll find the most important answers, as well as our recommendations for the region’s most beautiful cenotes.

Cenotes in Mexico - Cenote Ik Kil near Chichen Itza

What Are Cenotes in Mexico?

The term “cenote” comes from the Mayan word “dzonot,” which means “sacred well” or “water hole.” Cenotes are natural openings in limestone that provide access to underground freshwater reservoirs. They are part of one of the world’s largest contiguous underwater cave systems, which extends beneath the entire Yucatán Peninsula. Unlike in many other regions, there are hardly any surface rivers or lakes in Yucatán. That’s why cenotes have always been the most important source of fresh water here.

How are cenotes formed?

You can read more about the geology of these unique sinkholes in this Wikipedia article on cenotes.

The formation of cenotes is based on the porous limestone that makes up the entire Yucatán Peninsula. Rainwater seeps through the limestone and chemically dissolves it over long periods of time. This creates underground cavities and cave systems, similar to those found in other karst landscapes. When the ceiling of such a cavity eventually collapses, an opening forms at the surface—a cenote. You’ll find a particularly large number of cenotes along a circular fracture pattern in the limestone. This pattern dates back to the Chicxulub asteroid impact 66 million years ago. If you’d like to learn more about this geological context, you’ll find detailed background information in our article on the formation of the Yucatán Peninsula.

What types of cenotes are there?

Not every cenote in Mexico looks the same. Broadly speaking, there are four types of cenotes in Mexico:

Open cenotes (Cenotes abiertos): The ceiling of the cave has completely collapsed, so the cenote looks like an open lake or pond under the open sky. Natural light usually illuminates these cenotes, making them especially popular for swimming.

Semi-open cenotes (Cenotes semiabiertos): Only part of the ceiling has collapsed here. A natural rock roof still covers one section of the cenote, while the other section remains open. This interplay of light and shadow often creates particularly photogenic effects.

Cave cenotes (Cenotes de caverna): These cenotes are almost entirely underground and are accessible only through a small opening or a cave entrance. Inside, impressive stalactites and stalagmites greet visitors, often lit by rays of light streaming through small openings.

Underground cenotes (Cenotes subterráneos): The most difficult type to access, located entirely below the earth’s surface and usually of interest only to experienced cave divers.

Why were cenotes so important to the Maya?

For the Maya, cenotes in Mexico were far more than mere water sources. Since there are virtually no rivers on the peninsula, cenotes ensured the survival of entire cities and civilizations. At the same time, the Maya considered them sacred sites and gateways to the underworld, Xibalba. Archaeologists have found offerings and even ritual objects at many cenotes, such as the famous Sacred Cenote at Chichén Itzá. To this day, this spiritual heritage plays an important role in many Maya communities.

Snorkeling in a crystal-clear cenote in Mexico

The Most Beautiful Cenotes on the Riviera Maya

Many consider the region around Cancún, Playa del Carmen, Tulum, and Valladolid one of the areas with the most cenotes in the world. Among the best known are the Sacred Cenote in Chichén Itzá and the cenotes around Tulum. Numerous less-crowded cenotes can also be found inland near Valladolid and Cobá. Many of our excursions take you directly to these cenotes, such as on the tour to Chichén Itzá, the excursion to Tulum and the cenotes, or our tour to Cobá and Punta Laguna.

Cenote cave with skylight and turquoise water in Mexico

Practical Tips for Visiting Cenotes in Mexico

If you want to swim in one of the many cenotes in Mexico, you should avoid using biodegradable, mineral oil-free sunscreen—or skip it altogether—since many cenotes are very sensitive ecosystems. At most cenotes, you’ll need to take a quick shower before swimming. The water remains pleasantly cool year-round, usually between 24 and 26 degrees, regardless of the outside temperature, which makes cenotes a welcome way to cool off, especially on hot days.

Frequently Asked Questions About Cenotes in Mexico

What does the word “cenote” mean?

The word “cenote” comes from the Mayan word “dzonot” and roughly means “sacred well” or “waterhole.” It refers to a natural opening in limestone filled with fresh water.

How many cenotes are there on the Yucatán Peninsula?

Estimates suggest there are several thousand cenotes on the Yucatán Peninsula, many of which have not yet been fully explored or mapped.

Is the water in cenotes clean and safe for swimming?

Yes, most cenotes open to visitors offer filtered groundwater that stays very clear and clean. Many operators also enforce environmental protection measures, such as requiring visitors to shower before entering the water.

Which cenote is best for families with children?

Open cenotes with easy access and calm waters are usually best suited for families. Our guides will be happy to advise you on which cenote is best suited for your group for a specific trip.

Conclusion

Cenotes are one of Mexico’s most extraordinary natural phenomena and are inextricably linked to Mayan history and culture. Whether they’re open-air swimming holes or mysterious cave cenotes, each cenote has its own unique character. If you’d like to experience this unique natural wonder for yourself, feel free to check out our Mexico tours in English, which regularly include visits to cenotes.