Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This monument marks the beginning journey of a wounded soldier's leg that ended up almost two states away.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

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

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A beautiful oddities shop crammed with strange and morbid curiosities.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

This collection honors the iconic, and proudly American lighter that just won't quit.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Alexander Hamilton’s creation caused quite a bit of controversy.

This jail which was in service for over a century is now open for curious visitors.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

A diorama of the Civil War, fought by cats.

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

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

An Irish Memorial commemorating those who perished due to potato blight.

These lush botanical gardens employ the most purrfect pest control force.

A daily replay of the experiment that proved the rotation of the Earth.