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.

The first green space constructed on an elevated viaduct.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

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

Noirish green neon marks the location of one of the oldest private detective agencies in France.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

A magical place that lets you play in and explore the world of Studio Ghibli.

Mountain where Jesus was first tempted by the Devil.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Week-long block party becomes a competition for the best decorated street.

A beautiful but toxic fountain of mercury.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Artists and musicians now rule over this former rail station.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

One part local history, 99 parts gruesome haunted house.

Banksy gives themself artistic license with this piece of London street art.