Huesca’s underground secret: the Pyrenean cave that sheltered “witches” and took 30,000 years to form

Some sites have the power to fascinate visitors from the very first step. The Cueva de las Güixas, located in the Huesca municipality of Villanúa, is one of them. Beneath the mountain lies a captivating network of stalactites, stalagmites and galleries patiently carved by the continuous action of water since the last Ice Age. This geological phenomenon, which began approximately 30,000 years ago, can now be explored through guided tours suitable for all ages. Recognized as one of the most unique caves in the Pyrenees, the grotto offers an underground journey among unusual rock formations, streams and idyllic corners. Its carefully designed lighting accentuates the contours of the stone and envelops visitors in an almost unreal atmosphere. The lighting highlights the contours of the walls and creates an atmosphere that transports visitors to another time. Photo: Turismo Aragón However, the appeal of the Güixas extends beyond geology. Its chambers provided shelter for humans as early as the Neolithic period and, centuries later, served such diverse purposes as a prison and a stronghold for military troops. This rich historical legacy is accompanied by an aura of legend passed down from generation to generation. Various documentary sources and oral traditions claim that, between the 15th and 18th centuries, the cave hosted nighttime gatherings and alleged witches’ sabbaths, becoming associated with the folklore of witchcraft. One of the most notable stories is that of Guirandana de Lay, executed in 1461 after being tried for sorcery. Today, the tour revisits these episodes with journalistic and scientific rigor. Through the guides’ accounts, visitors understand that the persecuted women were primarily victims of the era’s climate of superstition, moving away from the malicious myth used to portray them for centuries. A PRIVILEGED SETTING The Cueva de las Güixas is located in a privileged natural setting beside the Aragón River and very close to a small waterfall, allowing visitors to enjoy both the area’s geological heritage and its Pyrenean landscape. The opinions of those who have already visited reflect the positive impression the experience leaves. Many highlight the quality of the explanations during the guided tour and consider the ticket price fully justified. “Every euro seemed well spent,” reads one visitor review. Others recommend booking in advance, especially during the busiest months, as capacity is limited and places often sell out quickly. Reviews also frequently praise the cave’s surroundings, describing them as “spectacular,” where the landscape, river and nearby waterfall make the visit a complete experience. PRICES AND HOW TO BOOK Open throughout the year, the Cueva de las Güixas is undoubtedly one of the essential stops for anyone exploring the Pyrenees. Tickets to enter the cave and the CIN Interpretation Centre can be purchased online through the Turismo Villanúa website. All visits are guided and require advance booking because the site is protected and designated as a Site of Community Importance (SCI). Entering the cave independently is strictly prohibited. Duration: 1 hour and 15 minutes. Visitors must arrive on time for their reserved slot. Prices: general admission costs 12 euros, while the reduced rate is 9 euros. Children between 0 and 3 years old enter free. Notice: comfortable footwear and warm clothing are recommended year-round. Pets are not allowed.