The house where John Wilkes Booth conspired with his co-conspirators.

Home to items never before seen by the public.

A haunting tribute to pioneering photographer Clover Adams.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

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

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

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

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

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

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

Penn State's giant bug collection.

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

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

Steepest flood safety railway in the entire world.

Memorializing an American tragedy of massive proportions.

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

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

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