From ancient painted chambers in Cantabria to illuminated underground lakes in Mallorca, Spain holds some of the most remarkable subterranean landscapes in Europe. Discover what lies beneath.
Start ExploringSpain is home to over 10,000 catalogued caves, many shaped by millions of years of geological activity. These three destinations stand out for their beauty, accessibility, and historical significance.
Four interconnected chambers stretching over 1,200 metres, Cuevas del Drach shelters Lake Martel, one of the largest underground lakes in the world. Visitors can enjoy classical music concerts performed on illuminated boats drifting across its still waters.
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Discovered by chance in 1959, the Nerja cave system spans nearly five kilometres and contains what is believed to be the tallest column formation in the world. Its natural amphitheatre hosts annual music and dance festivals each summer.
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Navigate Europe's longest accessible underground river by boat through a cave system that has drawn human visitors for over 15,000 years. Magdalenian rock art near the entrance speaks to the cave's deep history, while the constant 20 degrees Celsius temperature makes it comfortable year-round.
Read Full GuideMost tourist caves in Spain have paved walkways, but surfaces can be damp and slippery. Sturdy shoes with non-slip soles are strongly recommended for all visitors regardless of fitness level.
Spain's most visited caves, especially in summer months from June through September, can reach capacity by midday. Purchasing tickets online in advance is the best way to secure your preferred time slot.
Underground environments in Spain maintain a constant temperature, typically between 14 and 20 degrees Celsius. Even during hot summer days, bring a light jacket or sweater for your comfort inside.
The Iberian Peninsula sits on some of the oldest limestone formations in Western Europe. Over millions of years, water has carved an extraordinary network of underground galleries, rivers, and chambers beneath Spain's surface.
