A headstone tells the sad story of a lost little boy and his pet dog.

One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

A deteriorating 1990s Girl Scout camp in a beautiful lush park on Lake Ontario.

The grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

The strip club's VIP lounge is actually a rare repurposed Futuro House.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

A simple Colonial home with a past haunted by death and madness.

A relic from a forgotten bakery chain still spins atop a diner.

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

A second generation sun-powered marvel lights up the night.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.

For almost a century, this East Village newsstand has served egg creams to beats, hippies, punks, and everything in between.

A bright California graveyard with a decidedly dark side.

An eerie diorama that captures the majestic nature of a few prehistoric-looking beasts.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

This forlorn park is the result of a failed investment turned tax dodge.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

The site of a tragic massacre that spawned a multimedia franchise.