A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This abandoned ironworks was once the most important military supplier in America.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

The only presidential monument to display a late POTUS's actual casket.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

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

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

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

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

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

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

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

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

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

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

Steepest flood safety railway in the entire world.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.