Five days' trip to Dresden
Dresden is beautiful! It's like the whole Altstadt is a Baroque masterpiece. With the beautiful Elbe snaking it's way through the city, it's extremely pretty and has loads of history. Sure, it isn't as big and happening as some of the nearby cities (read Prague and Berlin), but partying shouldn't be your main reason to visit this place. Plenty of Christmas markets around the Altstadt and all of the built around architectural wonders.
Insider Tip:1) Do make a day trip to the Sachsische Schweiz (Saxony Switzerland). I went to Bastei (from Kurort Rathen) and the Koenigstein fort in one day.
2) Just sit on the Bruhlsche terrace and watch the Elbe meandering past you and the beautiful city across you. Also look back upon the Altstadt from the bridges (preferably at night).