Czech Republic, Prague is the capital of the Czech Republic. The historic centre, the old town is a UNESCO World Heritage Site. The Prague Castle is the largest castle complex in the world and the biggest dominant of Prague. Many museums, galleries, and theatres make Prague the cultural centre of the Czech Republic. The most famous landmarks are National Theatre, Charles Bridege, Oldtown hall with astronomical clock, and St. Vitus Cathedral. When the weather is good you can see the whole Prague from the Petřín Lookout Tower.