"Old Delhi is bereft of splendor: Jama Masjid is the largest Muslim mosque in all of Asia. Dating to the 17th Century and commissioned by Shah Jahan, Asia's largest mosque was built of sandstone and black marble over six years by 5,000 laborers. Five gates remind Muslims that they are to pray five times daily, and up to 20,000 gather here--with women and men typically praying at different times. Climb the steps of a 130-foot-tall minaret for panoramic views of Old Delhi."