An unassuming secret door once led to a legendary watering hole.

The childhood home of a Tampa sports legend now houses 135 years of baseball memorabilia.

This piece of early engineering is rather unknown despite its location in the heart of Madrid.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

A perilous medieval road leading right into the sea.

This unique rock formation has become a popular walking trail.

This groundbreaking 16th-century map is known as "America's birth certificate."

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

The atmospheric road was never meant to be so creepy.

Faces carved into the cliffs create an otherworldly walking trail.

A large wave-cut shelter, a major archeological site, overlooks the dry basin of Winnemucca Lake.

Stay in a luxury cabin or refurbished Airstream in this former mining camp-turned-retreat.

You’ll feel like you’ve gone through the looking glass at this contemporary art museum filled with glass sculptures of every size, shape, and color.

The first custom-designed building to showcase the works of Dale Chihuly is a wonderland of glass and light.

An eerie ship cemetery with gunfire as a soundtrack.

A New Hampshire grave with a grudge.

In this small strip mall resides the largest collection of original art from the famed TV artist.

An idyllic mineral hot springs facility with a more-than checkered past.

The overgrown remains of one of the premier auto-racing speedways in the Midwest—and also one of the most deadly.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Over a thousand feet beneath the Detroit streets is a subterranean metropolis few are allowed to enter.

Just off the city’s central station hides a quaint lamp-lit alley into medieval Elsinore.

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

This sculpture used famed boxer Joe Louis as the inspiration behind its body.