This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

Drink among marionettes at this pub inside a historic puppet theater.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Christ's blood allegedly preserved in a Belgian town.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Tintin's creator is celebrated in an immersive museum that's an astounding work of modern art.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

With no menu and no sign, this 130-year-old taverna doles out affordable home cooking.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

An ancient octagonal weather station named for the eight Greek gods of wind.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

A man throwing a giant severed hand towers over Antwerp’s main square.

Brussels' favorite peeing boy has a sister.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

This curious, round temple is the oldest still-standing marble building in Rome.