Bike Touring Highlight
Porphyry is a collective term for various volcanic rocks. The landscape on the Saale was formed at the end of the Carboniferous Age about 300 million years ago.
More info: de.wikipedia.org/wiki/Hallescher_Porphyrkomplex
August 2, 2018
In the know? Log-in to add a tip for other adventurers!
Our Tour recommendations are based on thousands of activities completed by other people on komoot.