Potsdam

Park Sanssouci
This immense park outside Berlin in the city of Potsdam is on the UNESCO World Heritage list, along with all its outbuildings. Get there early: there is a 2000 person/day entry limit at Schloss Castle Sanssouci, a fabulous rococo palace with amazing interiors. One of the most noteworthy rooms in the palace is the Konzertsaal concert hall - dripping in rococo glory. Official information
The New Garden
hosts the Marmorpalais and the Palace Cecilienhof.
Gedenk- und Begegnungsstätte Ehemaliges KGB-Gefängnis Potsdam
Leistikowstr. 1 (http://www.kgb-gefaengnis.de). Literally the Memorial and Meeting-place Former KGB Prison Potsdam. From August 1945 it was occupied by soviet forces. It has been reconstructed as a prison for the counterintelligence. Today it's been left standing to remind people of the depressing reality of dictatorships. Open from May to October, every Saturday and Sunday 11-17h.
Holländisches Viertel
Right in the middle of Potsdam are the "Dutch Quarters", built in the 18th century by Dutch master builder Johann Boumann to attract other Dutch artisans. The quarters consist of 134 red brick houses, divided into four blocks. The history of the Dutch Quarters can be seen in the house in Mittelstraße 8.
Alter Markt
the old market is the historic city center, the Stadtschloss city castle is under re-construction. You can visit the Nikolaikirche there.
New Market,
the new market is an original preserved market square from the 18th century.
Park Babelsberg
is a beautiful park with a gothic-style castle. It is also part of the World Heritage site. One part of the university is placed here, so expect some students.

The Pfaueninsel Peacock Island is a small island with free living peacocks.

The Russian Colony - Alexandrowka. Alexandrowka consisits of a few "Russian Style" houses built for Russian immigrants during the reign of "The Soldier King". House No. 2 Haus 2 has a very interesting museum while House No. 4 Haus 4 has an excellent café. Visit their website for further information (http://www.alexandrowka.de).

Krongut Bornstedt
an architectonical complex in Italian style with a palace and a garden

Potsdam has several interesting museums to offer:

Haus der Brandenburgisch-Preußischen Geschichte
(http://www.hbpg.de). A museum about Prussia's history.
Museum of Natural History
Film Museum
(http://www.filmmuseum-pot...) , exhibitions about cinema history in Potsdam and movie theatre.
Filmpark Babelsberg
(http://www.filmpark-babel...) movie theme park. Well worth a visit, the first German expressionist film in the world was made at these studios. The next-door studios are home to Gute Zeiten, Schlechte Zeiten, a famous German soap opera.
Potsdam Museum
at the Dutch District.
Altes Rathaus
Changing exhibitions at the old town hall.
Gemäldegaleria

The beautiful collection of paintings at the sans souci palace.

The Glienicke bridge (Glienicker Brücke)

It is a bridge in Berlin which spans the Havel River to connect the cities of Potsdam and Berlin near Klein Glienicke. It was completed in 1907