The highest point in Washington state is a volcano covered in glaciers.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

A new kind of theme park for adults off the Las Vegas Strip.

Plot your trip through the city on the sidewalk.

A long abandoned hospital building on the outskirts of NYC.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A multimedia experience that chronicles the atrocities of racism.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

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

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

This quirky curiosity shop takes its cues from the world's bazaars.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

Remnants of a storybook amusement park hidden behind a strip mall.

Where manatees are the snowbird vacationers in these balmy Florida springs.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Home to items never before seen by the public.

The site of the climactic scene from the classic horror film is now a historic landmark.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.