The Staufen Castle, sitting on top of a mountain and surrounded by vineyards and fruit trees, was built in the 12th century. It was burned down 500 years later by Swedish troops, but the ruins still give you a good idea of what this grand castle looked like in the past.
Make sure to pay a visit to the medieval town of Staufen, where the legendary Dr. Faustus made his pact with the devil.