This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

Site of the greatest known waterfall that ever existed.

This graveyard contains markers and monuments dedicated to some of the darkest chapters in Washington's history.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

This lab's maddening silence is good for business but bad for sanity.

Derelict buildings are all that remain of a complex at the site of one of the worst mining disasters in Montana history.

Native Americans built this circle of stones, which was used to predict astronomical events.

On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

Indents in the pavement are all that remain from a grisly death machine in Paris.

An unrealized dream to wirelessly electrify the entire Earth.

The gravestones in this lost burial ground were bulldozed and replaced with houses and a dog park.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

A tangible and sobering reminder of an atrocity that took place during a secret war.

For those going through a life transition, a place to leave behind a piece of your former self.

This remote desert watering hole has a connection to a curious chapter of American history.