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

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

A tiny village church in dramatic surroundings.

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

These unique and ever-changing caves are a wonder of Iceland.

This stunning concert hall has become a symbol of Iceland's national recovery.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

The world's largest reflecting pool is just two centimeters deep.

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

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

This demon atop the Notre-Dame de Paris looks utterly bored.

A two-way chairlift system between Zugliget and the highest point in the city.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

An 800-year-old island castle in Guernsey's main harbor.

The first island in the world designated a light-pollution-free astronomical observation point.

At these downtown crossings, pedestrian lights show axe-wielding Vikings instead of the usual walking figures.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

The cave holds a spectacular array of stalactites and stalagmites, including one shaped like a giant human heart.

A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

A small but hugely whimsical theater where marionettes play out the "The Battle of Stalingrad."

You'll find just about anything in this funky Tbilisi flea market.

France's most famous cemetery, with some of its most curious tombs.