One of the best-kept secrets in Germany despite being a UNESCO-listed heritage site, Quedlinburg is seriously amazing. Its old town is almost completely half-timbered, and many buildings in the old castle district are very, very old: the Romanesque Church of St Servatius dates to 1129, has a 10th century crypt and has collection of early Bibles. The castle and the cathedral still dominate town's skyline in the same way they did for centuries. Quedlinburg is located in less populated area and a bit far from major tourist cities, so it's a great destination off the beaten track.