A charming, not too big, not too little town called Regensburg is located in the Bavarian forest. You can find 35 cultural UNESCO World heritage sites in Germany, and the medieval center of Ratisborn is one of them. The most magnificent sight next to the cathedral is the so-called “Stone Bridge,” built in the 12th century. It was a milestone in the architectural history of bridges, serving as a role model to many other well-known bridges, such as the Karlbridge in Prague and the London Bridge. It served as the only bridge across the Danube for more than 800 years.