World Heritage Sites: Exploring the World's Greatest Places

The oldest paintings in the world, in the extraordinary cave art of Altamira, Lascaux, and Chauvet.

Learning about the builder of Taj, the Mughal emperor Shah Jahan, and his beloved wife Mumtaz Mahal, for whom it was built.

The Great Barrier Reef is one of the world's natural wonders, drawing travelers to its shimmering, multicolored coral reefs, teeming with fascinating marine life.

The Mogao Grottoes, dug out of cliffs in the desert of northwestern China, contain one of the most dazzling collections of Buddhist art in the world.