In 1940, a boy chased his dog into a tree hole and discovered a hidden cave containing 17,000-year-old paintings that stunned the world

It sounds like the plot of an adventure movie. A summer afternoon in France. A dog running after a rabbit. A kid going after it down a hole in the earth. But what 18-year-old Marcel Ravidat discovered in September 1940 was not simply a hole, but a cave sealed for thousands of years, its walls decorated with some of the most breathtaking art ever created by human hands.

This was Lascaux. The story of how it was found, what it contains, and why you’ll probably never see it in real life is one of the most interesting in the history of human civilization.

Teen discovery that rocked the world
Ravidat returned to the site on September 12, 1940, with three friends, Jacques Marsal, Georges Agnel, and Simon Coencas. With a makeshift lamp, they went down a narrow vertical passage and found themselves in a gallery of prehistoric paintings unlike anything the modern world had ever seen.

One of the most famous examples of prehistoric art is the Lascaux Cave Paintings, discovered in the Dordogne region of France. These paintings feature an array of wild animals, including horses, stags, and bison, and are celebrated for their complex details and lively figures.

A few days later, their schoolmaster, Léon Laval, went into the cave and saw at once what it meant. He called in Henri Breuil, a world authority on prehistory, who confirmed the find. Word got around fast. The cave was no ordinary find; it was, as scholars would later call it, the "Sistine Chapel of prehistoric art."

What is actually inside
Lascaux is mind-bogglingly huge. The cave system is about 771 feet long and contains some 680 painted figures as well as an estimated 1,500 engravings. Nine galleries are dedicated to horses, aurochs, deer, bison, ibex, and big cats, including the dramatic Hall of the Bulls.

Some individual figures are more than six feet long. Vivid black, yellow, and red images were painted on pale limestone walls with pigments such as red ochre, charcoal, and manganese oxide. The presence of various painting techniques, including retouching and layering, demonstrates early humans’ advanced knowledge of artistic methods.

The painters are thought to have built makeshift scaffolding to reach the ceilings and worked only by firelight. The paintings were made some 17,000 years ago, long before the pyramids, long before writing, long before cities.

Why you can't go see it
That’s where the story turns. Lascaux opened to the public in 1948 and quickly became one of the most popular tourist attractions in France, with as many as 1,200 visitors a day at its peak. Sounds great. Until you realize what all those people did to the paintings.

Body heat, moisture, and carbon dioxide exhaled by thousands of visitors were slowly destroying the very art that they came to see. Green algae were noted on the walls in 1958. By 1963, the authorities had no alternative but to close the cave for good.

It didn’t end there. A peer-reviewed study published in 2001 in Microbiology, the journal of the Microbiology Society, revealed that the ceiling, walls, and sediments of Lascaux Cave were colonized by the fungus Fusarium solani and that black stains of probable fungal origin subsequently appeared on the walls. Biocide treatments were used for years in an attempt to control the outbreaks.

The biological crises kept stacking up. By the end of 2006 and 2007, the black stains had worsened, and a new fungal species, Ochroconis lascauxensis, was identified. French conservation teams are still actively monitoring the microbial populations in the cave today. Now, the cave is essentially a controlled-environment research station that no one can get into except scientists.

So what can you go and see?
A lot of money has been spent by France to bring Lascaux to the people without further destroying it. A partial replica, Lascaux II, was opened in 1983, a few hundred meters from the original, and draws nearly 250,000 visitors a year. Since 2012, Lascaux III has been a traveling exhibition, visiting museums around the world, including those across the United States.

The most immersive is Lascaux IV, which opened in December 2016 as the International Center for Parietal Art. It’s built into a hillside overlooking Montignac, and uses high-resolution 3D modeling and spatial sound to recreate the feel of the original cave as closely as possible. Think of it as the best-designed museum experience you’ve ever heard of.

The French Ministry of Culture also offers a free virtual tour of all nine galleries, which proved especially popular during the pandemic.

Why this still matters
According to EBSCO's Research Starter on the Lascaux Cave Paintings, the discovery of Lascaux changed the story of prehistoric art and showed how important these ancient expressions are to our understanding of human experiences and societal practices during the Paleolithic era.

In short, Lascaux showed that the impulse to create, to make something beautiful, to tell a story on a wall, is not a modern invention. It’s as old as the dawn of our species. That’s not just art history. That's something worth protecting.