The cave was discovered by a miner searching for mineral deposits at the site of an old silver mine.
The name 'Cave of Wonders' refers to the sheer variety of speleothems found, including pisolites, cave pearls, and curtains.
The 'Sala de los Lagos' features a large, crystal-clear underground lake that acts as a mirror for the formations above.
The entire cave system is carved into the base of the hill topped by the Castillo de Aracena.
Constant humidity and restricted access are strictly monitored to prevent the growth of 'lampenflora' (algae caused by artificial light).
Some of the rock formations are estimated to be several million years old.
The Gruta de las Maravillas is a phreatic cave system located directly beneath the town of Aracena in the Sierra de Aracena y Picos de Aroche Natural Park. Discovered by accident in the late 19th century, the cave features three levels of subterranean galleries filled with stalactites, stalagmites, and subterranean lakes. The route spans approximately 1,200 meters, though only a portion is open to the public. Geological activity shaped the cave primarily through the dissolution of limestone by groundwater, creating diverse mineral formations. The environment maintains a constant internal temperature of 16-19°C and humidity levels between 98-100% year-round. It was the first cave in Spain to open for tourism, welcoming visitors as early as 1914.
The entrance area and the exterior surroundings near the cave's exit provide the best opportunities for photography, as cameras are not permitted inside.
Book your tickets online in advance, as group sizes are strictly limited and time slots sell out quickly.
Wear rubber-soled shoes with good grip, as the walkways can be damp and slippery.
Bring a light jacket, even in summer, due to the high humidity and consistent cave temperature.
Attempting to visit without a reservation, as walk-in availability is rare, especially on holidays and weekends.
The cave occasionally closes for maintenance or due to environmental regulations; it is recommended to check the official website for current operational status before arrival.
Photography is strictly prohibited inside the cave; touching the rock formations is forbidden to protect the delicate mineral growth.
