If you’re after a day-trip destination, we’ve got a couple of suggestions. Located 20 miles away, Idar-Oberstein is worth jumping in the car for. Explore the area beginning with German Gemstone Museum, Crag Church and Bosselstein Castle. Don’t skip Trier either! Just 20 miles away, Porta Nigra, Arena Trier and Cathedral of Trier are must-sees here.