The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

Visit the site of a subway powered by nothing more than air--and lots of it.

An ideal wedding spot that is almost too ideal.

This Art Deco theater is the last remaining opera house in the “little Broadway of the North.”

In 1952, a strange encounter in the woods of West Virginia led to the legend of a 10-foot-tall monster with glowing eyes and a distinctive style.

A museum dedicated to the legend of Bigfoot in the Appalachian Mountains.

This museum started by a curious collector is now a place for believers and skeptics alike.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

This vast kitty-themed collection illustrates the history of human-cat interaction.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This tiny cottage surrounded by railroads is the oldest surviving structure in Fairmount Park.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

World's first "penitentiary," meant to be humane, drove men insane.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

A curious building honoring past and current members of a historic musical comedy troupe.

Huge masonic hall in Philadelphia with lavishly themed rooms.