The Grand Mosque gets its name for a reason: It's the third-largest mosque in the world (the first two are in Saudi Arabia), and it has enough marble, gold, and silver to make the Taj Mahal jealous. Seven giant Swarovski crystal chandeliers hang from the ceilings (more than one million crystals were used to create them), where silver looks like fine needlework; a giant Iranian carpet, handmade by hundreds of artisans, stretches from one end of the main prayer hall to the next; and marble with colorful stone and gold makes up the walls and floors. The mosque, which opened in 2008, holds three places in the Guinness Book of World Records: The largest chandelier (10m/33 ft. in diameter and 15m/49 ft. high); the largest carpet 7 sq. m (77 sq. ft.); and the largest dome of its kind (the mosque has 82, but the main one is 32m/105 ft. in diameter and 70m/230 ft. high).

The mosque can accommodate almost 401,000 worshipers at once, and offers free guided 60 45- to 90-minute tours at 10 9am Sunday to Thursday, and Friday afternoons. This is one of only two mosques in the U.A.E. that non-Muslims can visit (the other is Jumeirah Mosque in Dubai). Be sure to take your camera and dress modestly (if need be, the ladies near the shoe lockers can loan you a long dress and a headscarf something).