Strange red rock formations that have been attributed to a higher power for hundreds of years.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

The longest navigable underground river in the United States is home to countless blind and albino animals.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

A gigantic 10-foot tall stone man.

Why have you never heard of the second most popular tourist site in New York?

The private clubhouse for the members of the Academy of Magical Arts.

Storyville was New Orleans' historic red light district and hotbed of jazz music, sometimes referred to simply as "The District."

Historic funicular railway, believed to be the shortest railroad in the world.

Curious cave that stays a cool 56 degrees all year long.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Once a purveyor of Santeria supplies, religious products , and household sundries, now closed.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

The first U.S. town to secede from the Union, only to vote themselves right back in.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

An emerald-green grotto just a short trip from Austin.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

This former boomtown "island" is now submerged below Folsom Lake.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A 9 year-old boy’s elaborate cardboard arcade in his father’s used auto parts store.

A humid oasis combines recreation with exploration in a unique underwater cavern.