#1 Taj Mahal (Agra, India)
The Taj Mahal, a masterpiece of Mughal architecture built between 1632 and 1648, embodies Emperor Shah Jahan's devotion to his late wife, Mumtaz Mahal. This white Makrana marble mausoleum, inlaid with 28 types of semi-precious stones, shifts hues with the light. Its symmetrical gardens, 73-meter dome, and four minarets make it the most-visited monument in India.