The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.

The curious underground history of keeping Paris clean.

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.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

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

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

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

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

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The penultimate and final resting places of British General Edward Braddock—minus a few bits and pieces.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

It's believed Matilda Fitzwalter's life was the basis for the famed literary figure.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

A building shaped like the Army Corps of Engineers logo, because why not?