This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

An alien church provides much needed silence in the midst of a Finland shopping center.

This abandoned subway station can still be seen on regular commuter trips.

This mouldering abandoned mental hospital was once a center for progressive healing.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

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

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

An inspired museum dedicated to the patron saint of enslaved people, inside the cloisters where he lived and died.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

Garden dedicated to native carnivorous plants and site of huge flytrap heist.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.

This historic Chinese tower was said to have been haunted by fox spirits but is now haunted by a grisly murder.

This sensational Chinese temple walks visitors through the 76 weird departments of the afterlife.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.