In which a local geological marvel becomes a quaint roadside attraction.

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

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

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

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

No one knows who painted this mysterious mural in a Penn State basement.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Take a steam-powered ride straight out of the past on this Appalachian rail line.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

Curtiss is a forgotten figure in the early history of flight.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

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

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

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

A small granite block at this monument's base is the only part of Lincoln's Tomb outside of Illinois.

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

A historic covered bridge is but one example of an oddly prevalent American urban legend.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.