Marvel at this immense work of art that greets arrivals to the city.

The oldest skyscraper of Europe now stands dwarfed by the surrounding structures.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

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

Luxembourg's first beer museum honors the Grand Duchy's contributions to the art and science of beer-production.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

A stonemason's hilarious revenge came in the form of this peculiarly positioned gargoyle.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

The Kalamazoo factory has 100 years of instrument-making, and one big wartime secret.

This colorful New Orleans bookstore features rare and used titles, with a specialty in Cajun fare.

It's said the devil used this mushroom rock as a table for a late-night meal.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

A triumphal steel arch on the side of a German mountain.

A small man-controlled waterfall powers an Art Nouveau elevator and is accessed via narrow gauge, solar-powered tramway.

Twisted trees shaped by coastal winds make this woodland look like something from a spooky story.

A tiny chapel clings to a precipice above Germany’s gemstone capital.

An ornate century-old elevator still connects the two halves of Bad Schandau.

A Black Forest cuckoo clock theme park features one timepiece big enough to walk inside.