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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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 vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

This black cat was actually designed to ward off bad luck.

This medieval church tower has maintained its clockworks since the 16th century.

Its collection includes a broad array of social, geographic, graphic design, and political history.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

Dictionary Johnson’s favorite feline.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

Collection dedicated to brands, packaging and advertising.

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

Eighty million natural history specimens call this gargantuan museum home.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

The pockmarks across the building's facade are remnants of the Blitz.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The commemorative stone column conceals a secret laboratory.