A towering baroque basilica jutting out of the French countryside.

Site of one of World War I's most horrific scenes.

An ancient monastery, a locked room, and a mysterious book heist.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

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

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

The last bastion of Roman presence north of the Alps looms over a German town.

A former ironworks that was the first UNESCO industrial site.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

A huge musical instrument played by the ocean.

A musical instrument played by the sea.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This bridge was constructed from the rubble of the infamous Bastille.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.

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

Brussels' favorite peeing boy has a sister.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.