The districts Hradcany, Mala Strana and Stare Mesto make up the historic center of Prague which has been on the UNESCO heritage lists since 1992. A walk through Prague is like a visit to an open-air museum. Make Prague Castle your first port of call. The castle complex comprises several buildings and museums. Reserve at least a whole morning or afternoon, an entire day is even better. The Astronomical Clock in the Old Town district attracts hundreds of visitors each hour when the clock strikes and the apostles do their round. Don't blink because the spectacle takes less than a minute. Amble across Charles Bridge while taking in the sweeping view of Prague Castle. Rub the feet of the statue of St John od Nepomuk and you are sure to return to Prague one day. Attend an organ concert in the St Nicholas Church or in the Church of Our Lady before Tyn. The Josefov district, the Jewish quarter, tells of Prague's Jewish history. Do your shopping in this district in Parizska Avenue, Prague's most fashionable shopping street. Hop on a tram and go to Vysehrad, Prague's second castle. Be sure to visit Vysehrad Cemetery full of Art Nouveau sculpted tombs. Finally, check out the babies crawling up the Zizkov television tower, if you like to see a Communist building.