An unusual, funny and fantastic open air museum.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

Use a key to unlock this medieval sewer tunnel.

A former salt mine is now a cool picnic spot for families and asthmatics.

A curious cave church carved into the face of a cliff.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

The oldest continuously operating pharmacy in Europe.

This stunningly massive housing complex is a go-to filming location for dystopian sci-fi cinema.

In the middle of the Alaskan wilderness, lies a train trestle to nowhere.

The lost library of Alexandria, revived as a spearhead of cultural preservation.

Legends of adultery, love affairs, and charity swirl around this mysterious 17th-century Portuguese woman.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

This museum explores how a 1973 volcanic eruption forever changed this small Icelandic island.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

An island made out of shells, including a cemetery.

No one knows how many bodies are in this vault in a Chicago public park.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This tombstone marks the spot where the legendary British spy met his end.

A museum dedicated to the lovable crime couple Bonnie & Clyde, just a few miles away from the site of their early demise.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

This island hill is strewn with boulders carved by shipwreck victims from the age of sail.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

The mouldering manses of wealthy colonials still pock the streets of a Curaçao neighborhood.