The Burj Khalifa has claimed the record for the world's highest observation deck with the unveiling of a new viewing level on the 148th floor.

With its floor at a staggering 555.7 meters, it smashes the previous record held by Canton To...

Apparently Phoenix isn't well-known enough, because developers want to put it on the map with a giant pin-shaped observation tower. Designed by BIG, the Pin is a 128 meters tall tower topped with a giant ball and spiraling exhibition and recreation s...