Prague is widely considered to be one of the most beautiful cities in Europe and is among the most visited cities on the continent. src: Wikipedia
Hradčany - Prague castle home of czech kings and masters, biggest castle on world
Orloj - Astronomical clock on oldtown townhall's tower
Kostel Matky Boží před Týnem - Church of Our Lady in front of Týn (for Pernille, inside is tomb Tyge Ottesen Brahe (Tycho Brahe))
Katedrála svatého Víta, Václava a Vojtěcha - St. Vitus, St. Wenceslas and St. Adalbert Cathedral
kostel Nejsvětějšího Salvátora - st. Salvator church
Charles IV. - king of bohemia and emperor of Roman empire
Národní divadlo -The National Theatre
Velký strahovský stadion - Great Strahov Stadium largest stadium in the world
Petřínská rozhledna (Petřín lookout tower) - our little (60 meters height) czech Eiffel tower on Petřín hill
Štefánikova (Petřínská) hvězdárna (Štefánik's Observatory) - observatory on Petřín hill
Strahov Monastery - a Premonstratensian abbey
Corinthia towers hotel
Karlův most - Stone bridge(Charle's bridge), third oldest in europe
Royal Summer Palace on Hradčany
Hilton hotel
Lighthouse Tower - Prague's modern architecture
Ball Game Hall on Hradčany
Rudolfinum - concert-hall
Chrám svatého Mikuláše - st. Nicholas cathedral
Tomáš Garigue Masaryk - first President and founder of Czechoslovakia