Best caves around Merindades offers a diverse landscape of karstic formations and geological features in the north of Burgos province, Spain. This region is characterized by extensive cave systems, natural rock arches, and ancient hermitages carved directly into the rock. Visitors can explore sites with significant natural, archaeological, and historical value. The area provides opportunities to observe unique geological formations and evidence of past human occupation.
Last updated: May 14, 2026
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Road Cycling Routes around Merindades
Hiking around Merindades
next to the road
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Ideal for taking a dip on hot days!
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Beautiful and surprising place. It's somewhat hidden if you don't look closely; a very curious cave-like structure opens up in the canyon. Its origin is unclear, but they have plenty of hypotheses! Definitely a must-see if you're passing by this road!
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Caves dug into the road from Trespaderne to Oña. A very cool place whose origin is unclear, whether they were used to shelter nomads or as cells for monks.
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The Hermitage of San Bernabé is located at the main entrance to the Ojo Guareña Karst Complex and is part of the caves. It is located in the municipality of Cueva de Sotoscueva. The date of its construction is unknown; some place it between the 8th and 9th centuries, but it is also believed to date back to the 13th century. It was originally dedicated to San Tirso.
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This is the best-known image of the famous town of Puentedey.
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Next to that magnificent oak is a rock shelter that served as a refuge for shepherds. This is the Coastal Cave.
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Singular tree of the province
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The Ojo Guareña Karst Complex is the most significant, boasting over 110 kilometers of mapped galleries and recognized as a Natural Monument. It offers a blend of geological marvels, archaeological treasures, and biodiversity. You can visit the Hermitage of San Bernabé of Ojo Guareña, which is carved directly into the rock at its main entrance.
Yes, the Ojo Guareña Karst Complex is rich in history, with evidence of human occupation from the Middle Paleolithic to the Middle Ages, including cave engravings, paintings, and ancient footprints. Additionally, the Hermitage of San Pedro is a rock-cut chapel featuring anthropomorphic tombs, showcasing medieval architecture and burial practices.
The region is famous for its karstic landscapes. A standout feature is the Natural Rock Arch of Puentedey, where an entire village is built atop a majestic stone bridge carved by the Nela River. This arch is an impressive natural gallery, over 30 meters wide and 15 meters high.
While some cave explorations require specific gear, the natural arch at Puentedey is very family-friendly, offering a unique village setting and scenic beauty that can be enjoyed by all ages. For a more adventurous experience, Palomera Cave within the Ojo Guareña system offers guided 'speleowalks' suitable for those who are comfortable navigating unconditioned galleries.
The Merindades region can be enjoyed throughout much of the year. Spring and autumn generally offer pleasant temperatures for exploring both the caves and the surrounding outdoor areas. Summer is also popular, but it's always advisable to check specific cave opening hours and conditions, as some may have seasonal variations.
The Merindades region offers various outdoor activities. You can find numerous cycling routes, including the 'Ojo Guareña Natural Monument Loop' for touring bicycles, or challenging MTB trails like 'Ojo Guareña y El Ventanón'. There are also easy hiking trails such as the 'Nacimiento del Cadagua Trail'. For more details, explore the Cycling around Merindades, MTB Trails around Merindades, and Easy hikes around Merindades guides.
Beyond the major sites, you can discover the Caves of Penedo de los Portugueses Hermitage, a curious complex of caves and galleries next to a stream in the La Horadada gorge. It offers a beautiful and surprising place to explore for those seeking something off the beaten path.
For guided 'speleowalks' in natural, unconditioned caves like Palomera Cave within Ojo Guareña, suitable footwear with good grip and warm clothing are essential, as cave temperatures are consistently cool. Some sections may also require crouching, so comfortable, flexible attire is recommended.
The Ojo Guareña Karst Complex is a geological marvel, formed by the erosive action of rivers over millions of years. It features stunning stalactites, stalagmites, and other geomorphological formations. The Hayal de Curtiveranos Cave also offers a glimpse into the region's diverse cave formations.
The Merindades region has various villages and towns that offer accommodation, cafes, and pubs. For example, Puentedey, with its unique natural arch, is a picturesque village where you can find local amenities. It's advisable to check specific locations for dining and lodging options closest to the caves you plan to visit.
The San Tirso and San Bernabé Caves are part of the Ojo Guareña Karst Complex and include the Hermitage of San Bernabé, which is carved directly into the rock. This site holds significant historical and religious value, with origins potentially dating back to the 8th-9th centuries, and features wall paintings from the 18th and 19th centuries.
Yes, several caves and related sites in Merindades are recognized as natural monuments. The Ojo Guareña Karst Complex itself is a declared Natural Monument. The Natural Rock Arch of Puentedey is also a prominent natural monument, showcasing the Nela River's erosive power.


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