17 Weird and Wonderful Facts About Mexico (That Aren't in Every Listicle)
Travel Guides · · 12 min read · By AirCarta
Photo via Pexels
Most "facts about Mexico" lists tell you that Mexicans eat tacos and that Day of the Dead is not Halloween. Fine, but you knew that.
These are the odd facts about Mexico that make people put their drink down: a capital city that is sinking half a metre a year, the largest monument human beings have ever built hiding under what looks like a hill, and a volcano that appeared in a farmer's field while he was working it.
Everything below is checkable. Where a popular claim turns out to be shakier than the internet suggests, we say so rather than repeat it.
🌎 Odd Facts About Mexico's Landscape and Geology
1. Mexico City is sinking about 50 centimetres every year
Not metaphorically. The city is built on the drained bed of Lake Texcoco, and decades of pumping groundwater out of the saturated clay beneath it have caused the ground to compact.
Parts of the city have dropped as much as nine metres since the beginning of the twentieth century. You can see it with your own eyes: the Metropolitan Cathedral leans, colonial buildings sit below street level, and pavements ripple like a slow wave.
The uncomfortable part is that it is largely irreversible. Once that clay compacts, refilling the aquifer does not lift the city back up.
2. The largest monument ever built is in Mexico, and it looks like a hill
Forget the Great Pyramid of Giza. The Great Pyramid of Cholula, in Puebla, holds the Guinness record as the largest pyramid and the largest monument ever constructed anywhere in the world, with an estimated volume of over 4.45 million cubic metres. Giza's is roughly 2.5 million.
Cholula is not tall, at about 25 metres, but its base covers 300 by 315 metres. Centuries of vegetation turned it into what appears to be a grassy hill, and in 1594 the Spanish built a church on top: the Iglesia de Nuestra Señora de los Remedios, which is still there.
On the claim you have probably read: you will often see "Mexico has more pyramids than Egypt." It is repeated everywhere and is very hard to verify, because it depends entirely on what counts as a pyramid across thousands of archaeological sites. The Cholula record, by contrast, is documented. We would rather give you the second one.
3. A volcano grew out of a cornfield, and people watched it happen
In February 1943, a farmer near the village of Parícutin in Michoacán noticed the ground in his cornfield cracking and smoking. Within a day there was a cone several metres high. Within a year it was hundreds of metres tall.
Parícutin is one of the very few volcanoes in history whose entire life cycle was observed by scientists from birth. It buried two villages, and the church tower of San Juan Parangaricutiro still juts out of the lava field, which is one of the strangest things you can go and stand next to.
4. The cenotes of Yucatán trace the crater that ended the dinosaurs
The Yucatán Peninsula is dotted with thousands of cenotes, water-filled sinkholes in the limestone. Plot the biggest ones on a map and they form a distinct arc.
That arc follows the rim of the Chicxulub crater, left by the asteroid impact around 66 million years ago associated with the extinction of the non-avian dinosaurs. The impact fractured the bedrock along the crater edge, and groundwater has been dissolving those fractures ever since.
When you swim in a cenote near Mérida, you are floating in a hole made, indirectly, by the rock that killed the dinosaurs.
Photo via Pexels
🏙️ Fun Facts About Mexico City Specifically
The capital deserves its own section, because it is strange in ways the rest of the country is not.
5. It was built on an island in the middle of a lake
Tenochtitlan, the Aztec capital, sat on an island in Lake Texcoco, connected to the shore by causeways. The Spanish drained the lake after the conquest rather than adapt to it.
Everything odd about Mexico City today, the sinking, the flooding, the water shortages, traces back to that single decision. The city sits on a lake bed, in a high valley, with no natural outlet.
6. People still farm on artificial islands built by the Aztecs
At Xochimilco, in the south of the city, farmers still work chinampas: rectangular plots built up from lake mud and staked with willows, a pre-Hispanic agricultural technique. They are among the most productive growing systems ever devised, and they are still producing vegetables and flowers today.
7. The axolotl exists in the wild in exactly one place on Earth
The axolotl, the permanently juvenile salamander with the fixed smile, is endemic to the canals of Xochimilco and nowhere else in the wild. It can regenerate limbs, spinal cord tissue and parts of its heart and brain.
There are hundreds of thousands in laboratories and aquariums worldwide. In its actual native habitat it is critically endangered, and surveys have struggled to find many at all.
8. There is an island covered in mutilated dolls
Also in Xochimilco: La Isla de las Muñecas, where a caretaker spent decades hanging discarded dolls from the trees, reportedly to appease the spirit of a girl who drowned nearby. They are still there, weathered and half-buried in vegetation. It is a genuinely unsettling place, which is presumably the point.
9. An active volcano looms over 20 million people
Popocatépetl, at over 5,400 metres, sits around 70 kilometres from the capital and is one of the most active volcanoes in North America. It regularly emits ash and steam, has a permanent monitoring and alert system, and is visible from the city on clear days.
Roughly 25 million people live within reach of a serious eruption, which makes it one of the most closely watched volcanoes anywhere.
📚 Weird Facts About Mexico's History and Culture
10. Mexico abolished slavery decades before the United States
President Vicente Guerrero abolished slavery by decree in 1829, more than three decades before the American Civil War ended it in the United States in 1865. Guerrero was himself of African and Indigenous descent.
This is one of those facts that quietly rearranges how the region's history fits together, and it rarely makes the listicles.
11. The oldest university in North America opened in 1551
The Real y Pontificia Universidad de México was founded in 1551, decades before Harvard (1636). Its successor, the UNAM, is now one of the largest universities in the Americas, and its main campus in Mexico City is a UNESCO World Heritage site in its own right, partly for its murals.
12. Mexico recognises 68 Indigenous languages, not one
Spanish is not legally the single official language. Mexico recognises 68 Indigenous language groups, with hundreds of regional variants, as national languages alongside Spanish, under legislation passed in 2003.
Náhuatl, the language of the Aztecs, still has over a million speakers. Several words you use daily came through it: chocolate, tomato, avocado, chilli, coyote.
13. The colour of European royalty came from a Mexican insect
For centuries, the deepest, most colourfast red available in Europe came from cochineal, a scale insect farmed on prickly pear cactus in Oaxaca. It took tens of thousands of insects to make a kilogram of dye.
After silver, cochineal became one of the most valuable exports of colonial Mexico. The red coats of the British army, the robes of cardinals, canvases by European masters: a great many of them are, chemically speaking, Mexican beetles.
14. Vanilla is a Mexican orchid that refused to grow anywhere else
Vanilla comes from an orchid native to the Veracruz region, cultivated by the Totonac people long before Europeans arrived. When colonists took the vines abroad, the plants grew perfectly well and produced almost no pods.
The reason was pollination: the orchid depended on specific local insects. It was not until 1841 that a reliable hand-pollination method made vanilla cultivation viable elsewhere. Until then, essentially all the world's vanilla came from Mexico.
🐋 Weird Facts About Mexican Wildlife
15. Mexico has a UNESCO World Heritage site for whales
The lagoons of El Vizcaíno in Baja California Sur are protected as a biosphere reserve, established in 1988 and inscribed by UNESCO in 1993 under the name Whale Sanctuary of El Vizcaíno.
Grey whales migrate thousands of kilometres to breed and calve in these shallow lagoons. Very few World Heritage sites exist primarily to protect a marine mammal's nursery, and it is one of the few places on Earth where wild grey whales routinely approach small boats of their own accord.
16. A billion butterflies commute to Mexico every winter
Monarch butterflies from Canada and the United States migrate up to 4,500 kilometres to overwinter in the oyamel fir forests of Michoacán and the State of Mexico, clustering so densely that branches bend under them.
The strangest part is that no individual butterfly makes the round trip. It takes several generations to complete the cycle, meaning the ones arriving in Mexico have never been there before, and are navigating to a forest their great-grandparents left.
17. Mexico is one of the planet's handful of megadiverse countries
Mexico is on the short list of megadiverse countries, a small group holding the majority of Earth's species. It ranks among the world leaders for reptile diversity, and has enormous numbers of mammal, plant and amphibian species, many found nowhere else.
The reason is geography: it is where North American and Central American ecosystems overlap, with two coastlines, deserts, high plateaus, cloud forests and tropical jungle inside one border.
🤔 So What Are 5 Interesting Things About Mexico, If You Only Remember Five?
If you are going to keep five, keep these:
❓ Frequently Asked Questions
What is the weirdest fact about Mexico? The strongest candidate is that Mexico City is sinking roughly 50 centimetres a year, because it was built on a drained lake bed and has been pumping out the groundwater underneath itself for a century. Some districts have dropped nine metres.
Does Mexico really have more pyramids than Egypt? It is repeated constantly and is very difficult to verify, since it depends on what counts as a pyramid across thousands of sites. What is documented is that the Great Pyramid of Cholula is the largest monument by volume ever built anywhere.
What food came from Mexico originally? Chocolate, vanilla, tomatoes, avocados, chillies, corn, beans, squash and turkey. Italian tomato sauce and Swiss chocolate both depend on Mexican crops.
What are some fun facts about Mexico City? It was built on an island in a lake, it is sinking, farmers still work Aztec artificial islands at Xochimilco, the axolotl lives there and nowhere else in the wild, and an active volcano over 5,400 metres tall sits within sight of the city.
Is Mexico City really built on a lake? Yes. The Aztec capital Tenochtitlan occupied an island in Lake Texcoco, and the Spanish drained the lake after the conquest. The modern city sits on the lake bed, which is why it sinks and floods.
What is the axolotl and why is it special? A salamander that never leaves its larval form, native only to the canals of Xochimilco. It can regenerate limbs and even parts of its heart and brain, which is why it is studied worldwide, and it is critically endangered in the wild.
When did Mexico abolish slavery? In 1829, by decree of President Vicente Guerrero, who was himself of African and Indigenous descent. That is 36 years before abolition in the United States.
How many languages are spoken in Mexico? Spanish plus 68 recognised Indigenous language groups with hundreds of variants, all recognised as national languages under 2003 legislation.
🧳 Planning to See Any of This Yourself?
Half the facts on this list are things you can go and stand in front of: the leaning cathedral in the Zócalo, the church tower poking out of Parícutin's lava, the cenotes outside Mérida, the monarch forests in Michoacán between roughly November and March.
If you do go, sort out your data before you land. Mexico is a country where you will be using maps constantly, distances are long, and rideshare apps are how most visitors move around the cities. Roaming from the US, Canada, the UK or Europe into Mexico is one of the classic ways to add a painful line to a holiday budget.
A Mexico eSIM starts at $6.00 for 1 GB, and 5 GB for 30 days at $22.00 comfortably covers a fortnight of navigation, translation and photo uploads. It installs before you leave home and connects the moment you land.
👉 Browse Mexico eSIM plans from $6.00 →
Related reading: Browse eSIM plans for 190+ countries · How eSIM works · Check device compatibility