In what country is a building which displays the largest clock faces in the world?

The Abraj Al Bait, also known as the Clock Towers is a government-owned complex of seven skyscraper hotels in Mecca, Saudi Arabia. These towers are a part of the King Abdulaziz Endowment Project that aims to modernize the city in catering to its pilgrims. The central hotel tower, which is the Makkah Clock Royal Tower, is the fourth-tallest building and sixth-tallest freestanding structure in the world. The clock tower contains the Clock Tower Museum that occupies the top four floors of the tower. It is the world's second most expensive building, with a total construction cost of $15 billion US dollars.

The project uses clock faces for each side of the main hotel tower. The total height of the clock is 57 m (187 ft), just below the media displays under the clock faces. At 43 m × 43 m (141 ft × 141 ft), these are the largest clock faces in the world. The roof of the clock is 450 m (1,480 ft) above the ground, making it the world's most elevated architectural clock. Behind the clock faces, there is an astronomy exhibition. In the spire base and the iron-covered floors there is a scientific center that is used to view the moon at the beginning of the Islamic months, and to operate an atomic clock that controls the tower clock faces.

The other clocks in the photos are:

England's Big Ben with clock faces of 22.5 feet (6.9 m).

Switzerland's Zytglogge with clock faces of 23 feet (7m).

The Allen-Bradley Clock Tower (U.S.A) with clock faces of 40-feet (12m).