Bay of Biscay, Basque Coast Geopark, Bilbao, Spain

© Olimpio Fantuz/eStock Phot

Basque Coast Geopark, Spain

These dragon tail-like structures that stretch into the Bay of Biscay on the Basque Coast of northern Spain are part of one of the most unique and remarkable geological formations on the planet. With 89 square kilometres of hilly countryside and a 23-kilometre-long coast characterised by limestone mountains and flysch cliffs, visitors can discover 60 million years of uninterrupted geological history in the Basque Coast Geopark. It’s a wonderland for geologists, and for people who just like looking at interesting rocks. There are two guided tour options. The first, known as the Flysch Route, takes visitors along the coast, and the second, known as the Karst Route, takes visitors inland where the natural and cultural heritage of this ecologically diverse coastal region can be explored.