The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

For more than 25 years, this Philadelphia store has been offering a wide selection of Victorian oddities and antiques.

A unusual sanctuary for abused and exotic animals in South Jersey.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Hundreds of numbered stakes hidden in the woods mark the graves of the lost souls of a nearby asylum.

These World War I shooting range tunnels are now haunted halls of underground graffiti accessed through the roots of a tree.

The first pet cemetery in the United States.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.

An abandoned Victorian house transformed into a museum and store filled with taxidermy and vintage goods.

Where monkeys run wild and the humans are caged.

An oddity shop inspired by the history of the circus.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Where serial killer Aileen Wuornos drank her last beer.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

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

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A hip bar decorated with walls of golden skulls.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

An allegedly cursed tree represents a town's reckoning with a racist past.

In the early 1800s, surgery was also a show.

The final resting place of a famous 19th-century murder victim whose identity is still a mystery.

A completely round house designed for the Atomic Age.