La Grande Mosquée de Paris
This awe-inspiring white mosque, built between 1922 and 1926, has tranquil arcades and a minaret decorated in the style of Moorish Spain. Enjoy sweet mint tea and an exotic pastry in the charming courtyard tea salon or tuck into some couscous in the restaurant. Prayer rooms are not open to sightseers, but there are inexpensive—and quite rustic—hammams, or Turkish steam baths, exclusively for women with scrubs and massages on offer (check www.la-mosquee.com for restaurant/tea salon opening times and hammam prices).