Prague

Dating back to the ninth century, Prague Castle is recognised by the Guinness Book of Records as the largest castle complex in the world, covering an impressive 70,000 square metres (17 acres). The castle complex comprises a number of buildings, which include the gothic St Vitus Cathedral, a number of defence towers, a few museums and churches, the presidential palace and Golden Lane, a 16th-century street that once housed the royal goldsmiths.