Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

Historic medieval fortified city in southwest France.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The "lovely red Vega" of the legendary record-settling pilot.

Eighty million natural history specimens call this gargantuan museum home.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Famously misunderstood wonder of the ancient world

The fairy tale castle of the "fairy-tale king."