A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

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

The largest burial mound in the United States holds the remains of prehistoric West Virginians.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

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

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

There aren't too many operational funiculars around, but Pittsburgh has two!

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

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

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

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Largest Roman Catholic church in North America.