Built by Mughal Emperor Shah Jahan in memory of his beloved wife, Mumtaz Mahal, the Taj Mahal took more than 20 years to complete. The monument blends Persian, Islamic, and Indian architectural styles, and its sheer size is matched only by the attention to detail found throughout the complex. Photos don't really prepare you for seeing it in person. There's a reason it attracts millions of visitors each year and remains one of the New Seven Wonders of the World.