Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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

A small poultry graveyard in the courtyard of a popular Key West watering hole.

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

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

This bridge was constructed from the rubble of the infamous Bastille.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

A Parisian exterminator's shop whose storefront displays stuffed rats hanging from traps.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

Indents in the pavement are all that remain from a grisly death machine in Paris.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The attic of a four-century-old canal house hides a clandestine church.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Largest illuminated advertisement sign in the world.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

Amsterdam's former hotspot for public executions and dissections.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

The study has wall paneling from a 17th century ship.