New Makkah Clock ( the largest in the world)

The Mecca Clock Tower will be more than 600 meters tall and six times the height of London's Big Ben .

The front side of the clock is adorned with glass mosaic and made of carbon fiber -- a highly-resilient material used in various technologies such as aerospace.

The two main faces of the clock are 43 meters squared each, with the other two faces measuring 43 by 33 meters.