Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The obelisk meant to mark the founding father's grave at Monticello is actually on the University of Missouri campus.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

An unknown number of cholera victims are buried in two nondescript graves.

This remarkable collection devoted to the study of fish includes 1 million preserved specimens from all around the world.

A small museum in the Bay of Pigs gives the Cuban perspective on the famously failed U.S. invasion.

The world's first hotel built in an abandoned water-filled quarry.

Explore the quarry where the marble was sourced for Michaelangelo's David.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

The world's only bushplane museum captures the spirit of the early planes and pilots and their contributions to northern life in Canada.

A secret meeting in this small cottage changed the course of British history.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

A forgotten graveyard lost in the tangles of an overgrown garden.

Norway has built what may be the world's most beautiful public toilet.

An abandoned aircraft sits submerged in a lake in the Alaska wilderness.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

Built in the 1300s, this magnificent building that hosted England's kings and queens transports you to the Middle Ages.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

The world’s largest combined collection of U.S. and Russian aircraft got its start in a poultry building.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.