Two standing giants remain as a tribute to Luxembourg's metallurgical past.

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.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

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

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

Guitarist Paco de Lucía overlooks travelers as they pass through this train station dedicated to his legacy.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

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

Elaborate tile work in this railway station tells the story of Portugal.

A hidden three-foot-wide house separates these two regal churches.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

The best place in the world to buy tinned fish.

As the highest point in the Mid-Atlantic range this stratovolcano offers spectacular views.

A fortress off the West coast of Portugal that dates back to 1502.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

The discovery of these rare, ancient artifacts led to the creation of a new museum.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

The world's most elegant power lines.

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.