Jama Masjid

India's biggest mosque
Word to the wise: Tourists are not allowed to enter during prayer hours. Dress appropriately - if you arrive unprepared, hire a robe at the entrance of northern gate.

Built in the 1650s by Mughal Emperor Shah Jahan, the man behind the Taj Mahal, this architectural marvel lies west of the Red Fort and is capable of accommodating 25,000 faithful in its enormous courtyard.
The mosque is accessible from three different gates, however the north gate (number 3) is its main entrance. Nearby is a cupboard containing some of Mohammed's relics, including a Quaran written on deer skin.

Once you enter through the iron doors, climb the 300 or so steps to the main courtyard. Ascend the southern tower to get a bird’s eye view of Old Delhi and to soak up the atmosphere of one of the city's liveliest and most evocative quarters.