A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.

The building was originally a gas station built to resemble a Japanese tea house.

A downtown park built on top of unclaimed graves.

A house turned museum is the real-life "home" of the fictional main character of The Wizard of Oz.

Home to Hollywood history and a very special salt crystal.

The iconic Manhattan corner that was once the site of the Beastie Boys' fake clothing store.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

There must be a pun in this haystack somewhere...

Wine bottle sculpture with a ship's stateroom inside.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

The "Seinfeld" diner.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

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

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Avoid gangster interaction while window-shopping.

Illegal drag racing two stories beneath Chicago’s streets.

A haunted hill that supposedly defied gravity.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.