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

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

A retrofuturistic art installation in the Pittsburgh Airport.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

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

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

An ideal wedding spot that is almost too ideal.

One of the oldest of its kind.

Hundreds of protractors affixed to surfaces all over the city.

This dramatic rail curve was once the target of a failed Nazi attack.

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

The first American axe throwing club.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

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

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

A field of nothing but boulders which resembles a giant's gravel driveway.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

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

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

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