Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Six beautiful wooden giants are hidden around Copenhagen.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Hans Christian Andersen for the postmodern world.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

The smallest country in Australia is a principled little thing with a friendly emperor.

France's high-tech, future-themed amusement park.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

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

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

Abandoned railway line circling the city of Paris.

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

The first green space constructed on an elevated viaduct.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

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

The celebrated eyesore created by starry-eyed sweethearts.

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

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

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

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