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Underground Wonders of Spain

Explore the Most Fascinating Caves and Grottos in Spain

From the crystal-clear underground lakes of Mallorca to the prehistoric masterpieces of Cantabria, Spain hides some of Europe's most spectacular subterranean landscapes beneath its sun-baked surface.

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Featured Guides

Spain's Most Remarkable Underground Sites

Interior view of Cuevas del Drach showing stalactites and underground lake in Mallorca, Spain
Mallorca, Balearic Islands

Cuevas del Drach - The Dragon Caves of Mallorca

Descend into one of Europe's most visited cave systems, where four interconnected caves stretch over 4 kilometers beneath the island of Mallorca. The highlight is Lake Martel, one of the largest underground lakes in the world, where classical music concerts are performed on illuminated boats. First documented in 1338 and fully explored in 1896, these caves continue to captivate over a million visitors each year.

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Interior of the Caves of Nerja with impressive stalactite and stalagmite formations in Malaga, Spain
Malaga, Andalusia

Caves of Nerja - A Natural Cathedral Underground

Stretching nearly 5 kilometers along the coast of Malaga, the Caves of Nerja house one of the world's largest stalagmites and a natural amphitheater used for summer concerts. Rediscovered in 1959, the caves also hold Paleolithic paintings that may date back 42,000 years.

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Famous bison painting from Altamira Cave, a Paleolithic masterpiece in Cantabria, Spain
Cantabria, Northern Spain

Altamira Cave - The Sistine Chapel of Prehistory

Home to some of the finest examples of Paleolithic art ever discovered, the Cave of Altamira is a UNESCO World Heritage Site. Although the original cave is closed for conservation, the museum and Neocave replica offer a faithful experience of the breathtaking 36,000-year-old bison paintings.

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Practical Advice

Tips for Visiting Caves in Spain

Book Tickets in Advance

Popular caves like Cuevas del Drach and Nerja can sell out during peak season (June to September). Buying tickets online at least a week ahead ensures you get your preferred time slot and sometimes includes a small discount.

Dress Appropriately

Cave temperatures typically range from 14 to 18 degrees Celsius year-round. Bring a light jacket even in summer, and wear sturdy shoes with good grip, as cave floors can be slippery from moisture and condensation.

Best Time to Visit

Spring (April to May) and autumn (September to October) offer the ideal balance of pleasant weather and smaller crowds. Many caves run extended hours in summer but expect longer queues and fuller tour groups during holiday periods.

Photography Rules

Flash photography is prohibited in most Spanish caves to protect delicate formations and any preserved artwork. Some caves allow non-flash photography while others ban cameras entirely. Always check the specific rules before your visit.

Ready to Explore Spain's Underground?

Browse our detailed guides for the best caves in Spain, complete with visitor tips, ticket information, and recommended routes for every experience level.

Cuevas del Drach Caves of Nerja Altamira Cave