A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Architectureal fantasy quarter of Rome.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Op-art architecture designed for happiness.

The final resting place for the remains of 143 Habsburg royalty.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

It's good luck to be mocked by this monkey.

Tiny memorials honor individual victims of the Holocaust.

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

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

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

Eighty million natural history specimens call this gargantuan museum home.

A little sculpture with a large wardrobe.

This historical Netherlands fortress still bears the marks of its single siege.

Incredible labyrinth of man made caves.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.