4Abraj Al-Bait Clock Tower – Saudi Arabia

Also known as the Mecca Royal Clock Tower, this building reaches 601 meters and has 120 floors.

It houses a luxury hotel, shopping malls, and prayer areas for pilgrims visiting the Grand Mosque. The four clock faces near the top are the world’s largest, visible from miles away. At night, the clock glows green, guiding worshippers toward the holy site.

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