Exploring the depths...
Millions of years of geological history have carved some of Europe's most breathtaking subterranean landscapes beneath the Spanish terrain. From crystal-clear underground lakes to Paleolithic masterpieces, embark on a journey into the deep.
Start ExploringSpain is home to over 10,000 documented caves, many of which are open to public exploration. Below are three of the most exceptional sites, each offering a unique window into the geological and cultural heritage of the Iberian Peninsula.
Nestled beneath the eastern coast of Mallorca near Porto Cristo, the Dragon Caves stretch over 1,200 metres and shelter Lake Martel, one of the largest underground lakes in the world. Daily classical music concerts performed from small boats on the lake create an unforgettable atmosphere that draws over a million visitors each year.
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Often called the "Sistine Chapel of Paleolithic Art," Altamira houses polychrome paintings dating back 14,000 to 36,000 years. The original cave is closed for conservation, but the adjacent museum and replica cave faithfully recreate the experience of standing beneath those ancient bison and horses.
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Glide along the longest navigable subterranean river in Europe. The cave system at Vall d'Uixo stretches nearly 3 kilometres, with visitors travelling by boat through dramatic stalactite-lined passages illuminated to reveal millions of years of geological artistry.
Read full guideMost show caves in Spain operate on guided tours lasting between 45 minutes and two hours. Temperatures inside typically range from 14 to 20 degrees Celsius, regardless of season, so bringing a light jacket is always recommended. Sturdy footwear with non-slip soles is essential, as many cave paths are damp. Booking tickets in advance during the summer months (June through September) is strongly advised, as popular sites like Cuevas del Drach can sell out days ahead.
Cave interiors maintain a constant temperature that can feel chilly after walking in the Spanish sun. A lightweight jacket or sweater will keep you comfortable without adding too much bulk for the underground walkways.
The paths inside caves are often wet and uneven. Closed-toe shoes with good grip are a must. Sandals and heels are typically not permitted by cave operators for safety reasons.
From late June through September, visitor numbers surge. Many caves offer timed entry and operate at limited capacity to protect the formations. Purchasing tickets online a few days early saves waiting time.
Stalactites and stalagmites take thousands of years to form even a single centimetre. Touching, leaning on or breaking them damages irreplaceable natural heritage. Stay on marked paths at all times.
Most caves allow photography without flash. Flash lighting can harm cave ecosystems and disturb delicate formations. Check specific rules before your visit, as some sites restrict tripods or selfie sticks.
Not all caves are wheelchair accessible. Some involve steep staircases or narrow passages. Contact the venue ahead of time to ask about mobility accommodations and available routes.
Official travel information, itineraries and accommodation guides for visiting Spain.
Overview of all UNESCO-designated sites across Spain, including cave art heritage.
Wikipedia's comprehensive catalogue of documented cave systems throughout the country.