Taxidermied cartoon heads, unseen illustrations, and famous characters all reside in this small gallery space.

A 1920s home transformed into an immersive art experience, where every room is a portal to another realm.

This Alamo Square mansion is rumored to have hosted satanic rituals and other occult practices.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

One of Jeff Koons’s largest sculptures and his first commemorative work.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This mural painted by Keith Haring was done without payment as a gift to entertain the children at the Hôpital Necker.

This Parisian gem is one of the most incredible ethnographic museums in the world.

An immersive projection art installation uses sound, scale, and light to take visitors inside classic works of art.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

This frog-themed restaurant was frequented by Picasso, Saint-Exupéry, and more.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

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

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

A surrealist timepiece by the artist of melting clocks.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This museum houses an imposing skeleton army comprised of creatures great and small.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A haunting collection of the vanished and disappearing natural world.