A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

This recreation of a 19th-century dime museum is full of oddities.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

One of the first commercially successful anthracite-powered iron-making operations in North America.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

Surrounded by industrial sprawl, a small monument marks the site of William Penn's first landing in Pennsylvania.

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

The oldest surviving presidential residence in the United States.

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

One of Philadelphia's largest murals resides hidden under this bridge.

The first of Lancaster's "rural cemeteries."

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

A legendary boxing venue and ring featured in Rocky V.

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

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.