The Makkah Royal Clock Tower stands at a colossal 1,972ft tall and is the tallest building in Saudi Arabia - and the fourth tallest in the world.
It's the sixth tallest freestanding structure on Earth, behind Dubai's Burj Khalifa, the Merdeka 118 in Kuala Lumpur, the Tokyo Skytree, the Shanghai Tower, and the Canton Tower in China.
The structure is located just 300 metres away from Islam's most sacred site, the Great Mosque of Mecca.
It was built as part of the King Abdulaziz Endowment Project that aims to modernise the city to better cater to its pilgrims.
Inside the Clock Tower you will find a five-storey shopping mall, a 5-star hotel, and parking for over a thousand vehicles. The top four floors house a museum.
In the spire there is an astrological observatory, exhibition space, and observation deck. The golden crescent contains a prayer room and is the highest occupied man-made space in the world.
It is six times the size of Big Ben, which stands at 315ft, and also dwarfs the UK's tallest building The Shard, which is only 1,017 feet high.