The world's first kilometre tall highrise is to set to start construction later this year.
Saudi Arabia's Kingdom Tower in Jeddah, Saudi Arabia designed by Adrian Smith + Gordon Gill Architecture, will boast a number of world firsts, including 56 of the world's fastest elevators. It's expected to be completed in 2018 at a cost of $US1.23 billion.
It will overtake the Burj Khalifa, in Dubai and which Adrian Smith had previously worked on, as the tallest building by 173 metres.
The Kingdom Tower will include hotels, offices, apartments and an observation spot and will be cheaper per square metre than its tallest predecessor.