The best part about having your own wheels is that you can go where you want, when you want. Make full use of your newfound freedom by checking out all that there is to do in Trier. It’s just 17 miles away. See the best sights beginning with Porta Nigra, Arena Trier and Cathedral of Trier. Locals will also likely point you in the direction of Idar-Oberstein, 20 miles away. If you only see one attraction here, let it be German Gemstone Museum. (But we’re also huge fans of Crag Church and Bosselstein Castle.)