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

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

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

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

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

Locals call this magical moss-covered walkway the "Emerald Path."

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

The oldest farmer's market in America is so ancient it was approved by the King of England.

The graffitied ruins stand hidden within the Pennsylvania woods.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

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

Mysterious rocks that ring musically when struck.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.