A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.

Giant topiary dog once played a role in a terrorist bomb plot.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The ancient tomb acts as a calendar that keeps perfect time.

Lewis Carroll's White Rabbit or something else altogether?

Famously misunderstood wonder of the ancient world

The anatomical-pathological collection of a man who changed surgery.

A cluttered and astounding collection of antiquities and curiosities.

Eyam took steps to quarantine themselves and keep the plague from spreading.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Where commuters walk through remnants of an ancient Greek necropolis.

Large collection from the 3rd millennium BCE.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The world’s first penitentiary, meant to be humane, drove men insane.

A layered tribute to the work of mosaicist Isaiah Zagar.

The first American department store, and home to the largest operating musical instrument in the world.