One of the world's steepest streets seems to have houses sliding down it.

The Dalai Lama named this New Zealand landscape the "Spiritual Center of the Universe."

Anyone wanting to know what a dwarven mine sounds like need only visit the tunnels of this New Zealand artillery compound.

A bronze kitty adorns the grave of the polar explorer who brought the original feline to the Antarctic.

A Maori village obliterated by an 1886 volcanic eruption.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

Once the path of a railway tunnel, now home to thousands of glowing insects.

Hidden beneath the streets of London is a secret subway that only carried mail.

This historic Melbourne bullet factory is fully encased in a massive glass and steel cone.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

Ghosts of France's colonial past.

Australia's largest medical museum featuring a 19th-century pharmacy.

Occult books, tarot, oddities.

The word 'wunderkammer' translates as 'wonder-chamber'. This Wunderkammer is both a museum and a retail store.

The labyrinthine storm tunnels beneath the city of Melbourne are ruled by a band of urban explorers.

This Parisian café sticks almost exclusively to an ethos of reuse.

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

A 200-year-old prison that now houses a peculiar crime museum.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

The oldest stone house in Paris was built by its most famous alchemist.

This little-known relic crypt holds stolen parts of a Roman Empress.

Weird wax anatomical models reside here, as do other anatomical specimens.

Notorious artist squat renovated into legal studios.