These fantastically named natural pools look like something out of a Scottish myth.

A 30-acre garden inspired by the principles of modern physics.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

This series of Scottish caves has no clear purpose other than baffling historians.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

One of the greatest maze designer’s greatest mazes.

Ancient paintings known as the "Sistine Chapel of Cave Art."

The huge golden reliquary of a testicle-smashing saint.

Legend has it this 11th-century castle was paid a visit from the devil.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

Acres of natural wonders left behind by a socialite-turned-gardener.

The post-apocalyptic remnants of a bucolic town ruined by a plane crash.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

The room where Vincent van Gogh died.

A charming flea market shop dedicated to retrofuturistic apparati.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Abandoned railway line circling the city of Paris.

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

Paris' linguistic guide to the international language of, yes, love.

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.

Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

A Belle Epoque bordello turned into a themed love hotel.