Strange beasts lurking in a garden are all that remain of a quirky, short-lived theme park.

Despite being made of a seashell mortar, the crumbling remains of this historic Florida mill are still standing.

Mile-long cave system near Great Smoky Mountains.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

Little Red Lighthouse under the George Washington Bridge.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

A bit of retro transportation flair preserved in the world's largest department store.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Elevated freight railway turned wildly successful urban park.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

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

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

Once featuring over 60 miniature replicas of famous Chinese locations, the Splendid China theme park was completely abandoned and is now mostly rubble.