A student driver's nightmare.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The remains of Crystal Palace Great Exhibition of 1851.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

Charles Babbage's proto-computer, painstakingly brought to life.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

Banksy gives themself artistic license with this piece of London street art.

Rebuilt remains of a temple to Roman god Mithras.

A hands-off space for graffiti artists to hone and display their skills.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

This public park was the site of the largest civilian disaster of the Civil War.

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.

Yo, Adrian!

Where the oil industry began.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

Memorializing an American tragedy of massive proportions.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

An Irish Memorial commemorating those who perished due to potato blight.