The 15th-century old town, with its open squares and buildings that resemble dollhouses, is more than just a pretty photo opportunity. It’s an area full of authentic charms, home to a cathedral, several churches and half-timbered houses. Insiders will let you in on a secret: From the colorful shopping street of Algade, you can take an elevator down into the bowels of an 11th-century Franciscan monastery.