Logbook · 4 places

Ojo Guareña

Merindad de Sotoscueva, Las Merindades, Burgos

1 Villages · 1 Monuments · 1 Nature · 1 Historical milestones

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Ojo Guareña

Nature · Merindad de Sotoscueva, Las Merindades, Burgos

Ojo Guareña is a karst complex in the province of Burgos formed by more than 110 kilometres of galleries, declared a Monumento Natural (Natural Monument) by the government of Castile and León on 14 March 1996. Its caves formed in carbonate materials from the Coniacian, and until the discovery of new galleries in the Mortillano system in 2009, it was considered the largest karst system on the Iberian Peninsula. Archaeological finds show it was used by humans from the Middle Palaeolithic to the Middle Ages, and more than 180 species of invertebrates have been catalogued within it. A visitor centre in Quintanilla del Rebollar offers insight into its history. The complex extends over 13,850 hectares and nearly four hundred cavities.

Photo: Roberto Lumbreras from Madrid, España (CC BY-SA 2.0)

What to see and do in Merindad de Sotoscueva