Basaltic cliffs of Castellfollit de la Roca (Ebro Basin, deformed foreland)

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The basaltic cliffs of Castellfollit de la Roca are a one of the sites most popular of Catalan geological heritage thanks to its unique beauty. It is located in the Volcanic Zone of the La Garrotxa, comprising more than 40 Quaternary volcanic cones in excellent condition.
The cliff is formed by overlapping two volcanic lava flows invaded the valley of the river Fluvià. Later, the river dug this obstacle and describes this remarkable precipice. One of the most notable is the disjunction in its hexagonal columns.