Taj Mahal
The Taj Mahal is considered "the jewel of Muslim art in India and one of the universally admired masterpieces of the world's heritage," which should be reason enough to visit its vaulted walls and beautiful gardens; but what's more, it was built from 1632-1653 by the Mughal emperor Shah Jahan in memory of his third wife, Mumtaz Mahal. Now that is some serious devotion.