In the heart of the Western Alps lies the fossil of a Supervolcano showing its deepest parts.
About 300 million years ago, there was only one continent on Earth, Pangea. Exactly in this period a volcano exploded, erupting an immense amount of material and releasing an energy equal to 250 atomic bombs.
Between 60 and 30 million years ago the same processes that formed the Alps lifted and rotated the part of the earth's crust in which the exploded volcano was, highlighting its power system, up to about 30 km of depth. This is a unique case in the world! It can be seen in an area that includes Valsesia and Valsessera, up to the edge of Lake Maggiore.
Since September 2013 the Supervulcano area, which includes the Alto Piemonte, has been part of the Sesia-Val Grande Geopark, officially recognized by UNESCO.