This historic old movie house was the scene of one of the Blob's most iconic attacks.

Pennsylvanian mass grave and possibly mass murder.

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

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

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

These unique rock formations were created during the Ice Age.

An industrial waste tourist attraction.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

An outlandish shoe shaped house built by an eccentric millionaire.

Political activist and writer Thomas Paine once lodged at this location.

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

Long before the Battle of Gettysburg occurred, dinosaurs roamed the area and left their footprints on this bridge.

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

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

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

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

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

The antique hotel still has a jail in the basement, though the cockfighting ring is long gone.

The first blast furnace in the United States that used coal and coke fuel instead of charcoal to make pig iron.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

This one-room cabin where the young colonel slept during the French and Indian War.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.