Stalin's square is one of the world class skate meccas, and so if you are in Prague, you shouldn't miss the opportunity to skate at this very well known spot which is also a great viewpoint from where you can see the whole city. The medieval Astronomical Clock, which is a popular tourist attraction, can be found on the southern wall of Prague's Old Town Hall. You'll find the best hostels in the city there and there is also a very good tourist atmosphere.
Charles Bridge is the oldest bridge in Prague. It crosses the Vltava River from the Old Town to the Lesser Quarter. It's a very busy place with an important flux of tourists, and is where artists and dealers put on their performances. Prague Castle is amazing for its history, its resistance to the passage of time and its enormus size. It isn't very close to the skatepark but it is well worth seeing.