3. Burj Burj is the tallest freestanding structure in the world It has the highest outdoor observation deck It used 82,000 panels of glass and the equivalent of five A380 airplanes of aluminium .
5. The centre Pompidou The Pompidou centre, Paris, has all the pipes, and air-con on the outside. It is an art gallery, movie cinema and a library. It was opened in 1977,and at that time there were 25,000 visitors per day.
7. Guggenheim It is made from titanium ,glass and limestone. The architect was Frank O` Gehry. Some people think it looks like bits of metal smashed together in a train crash. The art museum is famous because of it architecture.