The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

A semi-scholarly approach to sex.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Try not to get slimed in Tribeca.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This creative sculpture was a way to "recycle" an old tree.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

Electrical pylon in the shape of Disney's beloved mouse.

A historic presidential getaway on the continental United States' southernmost island.

One man's grief over the national tragedy has manifested in a pod of homemade whales on his front lawn.

The smallest post office in the United States is no bigger than a broom closet.

A self-explanatory attraction allows fans to respectfully remember and honor a comedy legend.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The famous boat that once ferried Bogart and Hepburn still floats in Key Largo after being abandoned for years.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

A perfect circle of 24 mysterious holes dates back to prehistoric times.

The only runway directly into the magic kingdom has been closed since 1972, but it still sings to you if you drive fast enough.

A tribute to Ponce de Leon's supposed quest for eternal youth.

An abandoned vacation home spent a decade taking on legends. It's now taking on water.

Military and first responders can test their skills in a Foggy Bottom mock station down in Georgia.

After just one epic test blast, this literal loose cannon proved too explosive for combat.

The site where Confederate president Jefferson Davis was defeated has been marked with a bust... that leaves that part out.