The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Hear the quietest sound from across the dome.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

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

These unique markers designate the route American forces took during the Liberation of France.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

These colorful French islands spent a stint bootlegging booze during American Prohibition.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

A French library that makes sure its love of books is writ large... giant in fact.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

Every president in history is immortalized in bronze in downtown Rapid City.

Small plaque marks the spot, but the true center is located about half a mile away on a private pig farm.

The “American Gothic" artist's largest works hang in an Iowa State University library.

A hidden barn-sized rendition of Grant Wood's most famous, and most parodied, painting.

World's largest Christmas store.

Though its branches are painted bright colors by generations of locals, the tree is said to be a haunted portal to hell.

Almost half-way between the Equator and North Pole.

Sleepy Minneapolis block beats Guinness Record for most churches on one city block.

The basement bowling alley of this St. Paul dive bar is decorated with thousands of dollar bills.

Half of a waterfall goes into the river while the other half seems to disappear.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.