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

A marvel of Byzantine engineering under the streets of Istanbul.

This aging storage facility is the world's largest brick warehouse.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

The world's largest wooden structure.

Spain's stunning solar energy plant.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

Once housed in the towers of this Gothic church, this 17th century clock still ticks today.

Rotterdammers' dirty minds gave this santa a dirty nickname and cursed it to a life of wandering.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

Wind power station for making famous Ketel One vodka.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

This still-celebrated home was a radical architectural experiment in 3D De Stijl.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

“And the Lord said unto Johan, build for thee an ark for the end of the world is approaching.”

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.