Let"s explore the Taj Mahal, one of the Seven Wonders of the World. On the banks of the Yamuna River in Agra, Uttar Pradesh, this ivory-white marble mausoleum will certainly leave an impression. The Taj, seen in today"s image, was commissioned in 1631 by Shah Jahan, the fifth Mughal emperor, to honour his beloved wife, Mumtaz Mahal.