You'll likely hear the mosques before you see them - the call to prayer can be heard five times a day in the morning as the sun starts to seep into your hotel room - and a trip to Dubai isn't complete without a visit to this mosque, the only one in the emirate that's open to non-Muslims. It's the city's principal mosque, and the one that Sheikh Mohammed and many other members of the ruling family attend. No prior arrangements are needed; tours are also organized by the Sheikh Mohammed Centre for Cultural Understanding. The 1 1/2-hour tour starts at 10am, but be sure to get there about 15 30 minutes before to ensure you have a spot. Men and women should dress modestly, though a traditional attire can be borrowed from the mosque. aAnd while kids 4 and under are not admitted, cameras are.