Spain's stunning solar energy plant.

The world's largest wooden structure.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Paris' linguistic guide to the international language of, yes, love.

The Argonaute submarine was the French navy's pride and joy in the 1950's.

The final resting place of the great navigator, or maybe his brother.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This submersible road connecting a French island to the mainland is lined with safety towers for when the tide strands travelers.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

A Gothic cathedral created from volcanic rocks.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.

A horse statue that receives constant makeovers from graffiti artists and locals.

Amsterdam's Red Light District leaves little to the imagination.

A little sculpture with a large wardrobe.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Giant heads occasionally litter the industrial Houston neighborhood where sculptor David Adickes has his studio.

One man's homage to the orange as realized through a long-term folk art labor of love.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.