Basque Coast Geopark in the Bay of Biscay near Bilbao, Spain

© Olimpio Fantuz/eStock Phot

Dragon tails trail to the sea. International Geodiversity Day

These dragon tail-like structures that stretch into the Bay of Biscay are part of one of the most unique and remarkable geologic formations on the planet. The Basque Coast of northern Spain is a wonderland for geologists and for people who just like looking at cool rocks. Guided tours of the Basque Coast Geopark allow visitors to discover 60 million years of uninterrupted geologic history.

Today is International Geodiversity Day, an observance introduced by the United Nations in 2021 to bring awareness to the many aspects of nature that aren't alive but are so crucial to our planet nonetheless, from rocks and soils, to landscapes, fossils, and glaciers.