Cenote guides
These cenote guides explain how cenotes form, why the Maya called them sacred, and how to plan a safe visit. Start with what is a cenote, then go deeper.
Plan your visit
Practical tips: safety, rules, prices, what to bring and the best time to go.
Are cenotes safe?
Are cenotes dangerous? Most visitor cenotes are safe if you follow simple rules. Real risks, safety tips and how to choose a safer cenote.
Cenote rules and sunscreen
Common cenote rules explained: why sunscreen and repellent are banned, showering first, life jackets, photos and drones. Follow them to protect the water.
Best time to visit cenotes
When is the best time to visit cenotes? Go early morning for fewer crowds, midday for light beams. What the rainy season changes and the best months.
What to bring to a cenote
What to bring to a cenote: swimsuit, cash in pesos, water shoes, mask, towel and dry bag. A simple packing list and what to leave at home.
How much do cenotes cost?
How much do cenotes cost in Mexico? Typical entry ranges, what pushes prices up, cash vs card, and where to find our verified prices for each cenote.
Cenote diving guide
Cenote diving explained: cavern dives for certified open-water divers, cave diving for trained divers, best cenotes near Tulum, what you'll see, and freediving.
How to get to cenotes
How to get to cenotes without stress: rental car, colectivo vans, taxis, bikes and tours compared. Tips for roads, parking and cash.
Planning a cenote day trip
How many cenotes can you visit in a day? Usually 3–4. Sample day plan, mixing open and cave cenotes, timing, food and what to skip.
Cenote photography tips
How to photograph cenotes: shooting light beams, phone and camera settings, underwater cases, drone and tripod rules, and staying respectful.
Accessible cenotes
Visiting cenotes with limited mobility: what to check (stairs, ramps, ladders, handrails), questions to ask and which cenote types are easier to reach.
Cenote science
How cenotes form, the different types, and the geology that makes the Yucatán unique.
How are cenotes formed?
Cenotes form when rainwater dissolves limestone, carving caves that later collapse and expose groundwater. Step-by-step geology of Yucatán cenotes.
Types of cenotes
The four main types of cenotes - cave, semi-open, open and ancient - how each forms, real examples, and which type is best for swimming.
The Ring of Cenotes
The Ring of Cenotes is an arc of hundreds of cenotes in Yucatán state that traces the buried rim of the Chicxulub impact crater.
The Chicxulub crater and cenotes
How the asteroid impact that ended the dinosaurs 66 million years ago shaped the Ring of Cenotes in Yucatán, and which cenotes you can swim in.
The halocline in cenotes
A halocline is the blurry layer where fresh water floats on salt water inside a cenote. Learn why it happens and where divers see it.
Cenote vs sinkhole
Every cenote is a sinkhole, but not every sinkhole is a cenote. The key difference is exposed groundwater.
Why is cenote water so clear?
Cenote water is crystal clear because rain filters through limestone, carries little sediment and has few nutrients for algae.
How deep are cenotes?
Most visitor cenotes are a few meters to about 40–60 m deep, while the deepest known water-filled sinkhole, Zacatón, goes past 300 m.
Sac Actun underwater cave system
Sac Actun near Tulum is the longest known underwater cave system, linking hundreds of cenotes including Gran Cenote and Dos Ojos.
The Yucatán aquifer
Cenotes are windows into the Yucatán aquifer, a huge underground freshwater system that supplies the peninsula's drinking water.
Stalactites and stalagmites in cenotes
Why underwater cenotes have stalactites and stalagmites: they grew in dry caves during ice ages before sea levels rose.
Wildlife in cenotes
Animals you can see in and around cenotes: small fish, turtles, swallows, the motmot bird, bats and blind cave species.
How to pronounce cenote
Cenote is pronounced seh-NO-teh in Spanish (English speakers often say sih-NO-tee). Where the word comes from in Yucatec Maya and what it means.
How many cenotes are there?
How many cenotes are in Mexico's Yucatán Peninsula? Estimates range from about 6,000 to 10,000. Why nobody knows the exact number.
El Zacatón cenote
El Zacatón in Tamaulipas, Mexico is the deepest known water-filled sinkhole, about 335 m. Its origin, record dives and why you can't swim.
Cenotes in Florida
Florida has no Maya cenotes, but it has limestone sinkholes and springs that look and work alike, such as Devil's Den. How they compare to Mexican cenotes.
Cenotes in Belize
Belize's Great Blue Hole is a giant marine sinkhole about 300 m wide and roughly 125 m deep. Inland blue holes and how they compare to Mexican cenotes.
What is at the bottom of a cenote?
What's at the bottom of cenotes: rock, sediment, fallen trees, fossils, Maya offerings and cave tunnels. What divers and archaeologists found.
The hydrogen sulfide cloud in cenotes
Why some cenotes have an underwater 'river' or fog layer: a hydrogen sulfide cloud from rotting leaves. How it forms and where divers see it.
Why cenotes have light beams
Those famous light rays in cenotes like Suytun happen when sunlight enters a small roof hole and hits dust and water. Best time, season and photo tips.
Cenote vs lagoon
A cenote is a sinkhole into groundwater; a lagoon is a wide shallow body of water. How Bacalar lagoon contains cenotes and why the colors differ.
Ice Age fossils in cenotes
Flooded cenote caves hold Ice Age bones: giant sloths, gomphotheres, saber-tooth cats and early humans like Naia. Why they're there and what was found.
Can you drink cenote water?
Cenote water looks pure but isn't safe to drink untreated. Why it can carry bacteria, how it links to Yucatán's tap water and how to keep it clean.
Threats to cenotes and how to help
Cenotes face sewage, farm chemicals, overtourism and construction over caves, including the Tren Maya. What the risks are and what visitors can do.
History of cenote exploration
From Edward Thompson dredging the Sacred Cenote in the early 1900s to cave divers mapping Sac Actun, a short history of how cenotes were explored.
Maya history
Why cenotes were sacred to the ancient Maya: water, gods, the underworld and what archaeologists found.
The Maya and cenotes
Why cenotes mattered to the ancient Maya: water, cities, the word ts'onot, offerings, Chaac, Xibalba and what archaeologists found inside them.
The Sacred Cenote of Chichén Itzá
The Sacred Cenote (Cenote Sagrado) at Chichen Itza: its size, the offerings and human remains found in it, its history and how to see it today.
Xibalba, the Maya underworld
What Xibalba is in Maya belief, its story in the Popol Vuh, and why caves and cenotes were seen as its entrances.
Chaac, the Maya rain god, and cenotes
Who Chaac is, how the Maya depicted him, and why offerings to the rain god were made at cenotes like the Sacred Cenote of Chichen Itza.
Cenote sacrifice: what we actually know
Did the Maya sacrifice people in cenotes? What human remains from the Sacred Cenote of Chichen Itza show, and common myths.
Naia and Hoyo Negro
Naia, a teenage girl who died about 12,000-13,000 years ago, was found in Hoyo Negro, a deep underwater pit in Quintana Roo. Discovery and why it matters.
Maya cities built around cenotes
Why the Maya built cities next to cenotes: water, ritual and power. Chichén Itzá, Mayapán and Dzibilchaltún's Xlacah cenote, and how water shaped settlement.
Chultunes and aguadas
Where there were no cenotes, the Maya dug bottle-shaped chultunes and lined aguada ponds to store rain. How they worked in the Puuc region.
Modern Maya cenote ceremonies
Cenotes are still sacred. The Ch'a Cháak rain ceremony, Maya blessings before swimming and how to visit respectfully in community-run cenotes.
Cenote guides: frequently asked questions
Where should I start with these cenote guides?
Start with what a cenote is and the types of cenotes, then read the planning guides (what to bring, rules, prices and safety) before your trip.
What do the cenote guides cover?
Three groups: trip planning (safety, rules, prices, best time, how to get there), cenote science (how cenotes form, depth, haloclines, the Ring of Cenotes) and Maya history (sacred cenotes, Xibalba, Chaac).
Where can I find a specific cenote?
Each cenote has its own page in the cenotes in Mexico directory, grouped by city. The guides link to the cenotes they mention.