Cologne Cathedral is one of Europe's most spectacular cathedrals and holds the record of the the biggest church facade in the world.
The Hohenzollern Bridge is a bridge crossing the river Rhine in the German city of Cologne.
The Petronas Towers were the tallest buildings in the world for six years, until Taipei 101 was completed in 2004. The height of the towers is measured to the top of their structural components such as spires, but do not include antennas.
