Where the oil industry began.

"Where the ducks walk on fish."

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

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

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

A quirky collection of outsider art made from automobile parts.

One of the U.S. Forest Service's only mansions is outfitted with a dinner table for floating food.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

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

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

An abandoned stretch of highway, deteriorating next to the operational one.

A toxic ghost town sitting atop a massive coal fire.

According to local history, this cast-iron canine was nearly melted down for bullets during the Civil War.

Rumors persist that a bottle of whiskey is sealed within this Demijohn-shaped adornment.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

The smallest covered bridge in Maryland.

Unannounced visitors are now welcome at the site of the largest Prohibition-era bootlegging operation in the region.

This historic lighthouse was well known for the large number of women who served as its keeper.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

The land is home to swimming ponies and a legendary 18th-century treasure.