Gorgeous views of Italian mountains and valleys form the backdrop of this unique open-air theater.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

An eerie, derelict amusement park in Berlin.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The site of one of history's most indelible and horrific tragedies.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A piece of the iconic wall found an unlikely new home in a Vegas bathroom.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

During the holidays, a vintage subway train whisks New Yorkers back in time.

Complete town of 5,000 living out at sea on the world's first offshore oil platform.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

The United States Capitol's former columns still stand.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

This Parisian café sticks almost exclusively to an ethos of reuse.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Apartment complexes built into huge repurposed natural gas tanks.