What began as a makeshift lost and found, now exists as a unique art installation.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A secret door leads to this cozy dive that sells only “milk.”

A beautiful medieval bridge allegedly constructed by the Devil.

A sprawling cave network created by a lone lava tube.

This 130-year-old, steam locomotive represents the Spanish industrial and agricultural boom of the late 19th and early 20th century.

The first KFC is on the National Register of Historic Places.

A well-studied colony of endangered bats roosts in this abandoned Victorian Gothic mansion.

This ancient fort overlooks the site of a disastrous retreat from the English Civil War.

An eerie, derelict amusement park in Berlin.

Its collection includes a broad array of social, geographic, graphic design, and political history.

Not far from Mount Rainer, an iron wonderland claims the landscape.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

The most important and best preserved remnant of West Africa's powerful Songhai Empire.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

Legends surrounding this megalithic tomb range from giants to a dwarf named Trollid.

A massive, abstract lookout tower providing a panoramic view of Prague.

In this beloved beach town, a secret seafood haven lies tucked behind a car wash.

The name of this ancient Indonesian temple translates as "Elephant Cave" but it could be more accurately called "The Hellmouth."

This ancient burial cave along a roadside is also home to several Buddhist sculptures.