One of the greatest maze designer’s greatest mazes.

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

The history of radiation is on safe display at the foot of a radiation science laboratory.

Science fiction's grandfather has a fittingly marvelous tomb.

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

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

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

France's national museum of scientific and industrial instruments.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

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

A haunting collection of the vanished and disappearing natural world.

This massive library holds what was once the largest book collection in the world.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

A museum of carnival attractions where you are invited to ride the rides.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Abandoned railway line circling the city of Paris.

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

The largest coin pyramid in the world is a carefully balanced stack of over 1,000,000 pieces.

Lithuania's outdoor sculpture trail of wooden folk art.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

This soviet pilot's graveyard is filled with headstones made of airplane fins.

The gutted remains of this Estonian mansion are a monument to a tragic love.