A building so large that it has its own weather.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

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

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

The naturally mummified body of a peasant girl saint.

Fortified medieval tower house with lovely roof garden.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

Petrified footprints of one of the very first vertebrates to walk on land.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

A hugely vast Irish landscape of barren rock that stretches for miles.

A cone-shaped top and cylindrical body set this 900-year-old structure apart from other Italian bell towers.

This vestige of Seychelles’s colonial past now resides in a busy intersection and didn’t chime for its first 96 years.

Berlin's old airport.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A meteorite-bounded town in Bavaria.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

Hidden in the forest are the remains of a former World War II chemical plant.

The world's first jet-powered aircraft were assembled by the Germans in this secret factory in the forest during WWII.