Zwinger Palace is one of the must-see attractions in the city of Dresden. It stands in the old town, between the Semperoper opera house and Postplatz, and was built on the site of an old fortress. I highly recommend getting up early so that you can walk around the yard before the crowds descend and enjoy it in a rare moment of absolute silence. The door of the crown (Kronentor), is the most famous and photographed part of the structure, decorated with a reproduction of the Polish royal crown. After buying a ticket, you can visit the collections of art and science inside.