The name 'Güixas' derives from the Aragonese word for witches, reflecting local legends of secret gatherings.
The cave serves as an important hibernation site for several species of endangered European bats.
The interior temperature remains constant at approximately 10 degrees Celsius throughout the year.
The site features a 'sima' or vertical pit that serves as a natural chimney for air circulation.
The entrance area served as a shelter for local inhabitants during the Spanish Civil War.
Geologically, the cave is a 'resurgence' site where water that disappeared higher up the mountain re-emerges.
Cueva de las Güixas is a natural karst cavity formed by the dissolution of limestone by water, located beneath the Collarada mountain peak. The cave system is renowned for its significant population of bats, which are protected species within the site. Historically, the location is associated with local folklore regarding 'güixas,' the term for witches in the Aragonese language. The guided tour follows a subterranean riverbed spanning approximately 800 meters. Visitors can observe distinct geological formations including stalactites, stalagmites, and flowstones. Archaeological evidence found at the site indicates human use dating back to the Bronze Age. The cave is situated within the municipality of Villanúa in the province of Huesca. It remains an active geological site with ongoing hydrological processes.
The central chamber where the large crystalline formations are illuminated.
Wear a light jacket as the temperature remains cool regardless of outside conditions.
Ensure your footwear has a good grip as the paths can be damp and slippery.
Book your guided tour in advance online, as capacity is strictly limited for environmental preservation.
Do not attempt to explore the cave system without an official guide, as many areas are restricted or unsafe.
Operating frequency increases significantly during the summer months and holiday periods; closed on certain midweek days during the low season.
