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

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

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Amsterdam's former hotspot for public executions and dissections.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

A public urinal so pretty, it was declared a national monument.

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

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

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

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

A "simple-hearted artist" turned an isolated Icelandic valley into his own art museum.

These enlarged egg sculptures represent the native birds of eastern Iceland.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

This natural rock formation features seemingly unnatural vertical ridges that have been blamed on elves.

A lonely beacon, precariously perched atop a remote sliver of rock.

Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.