Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

This 47-story "M" needed 20 years to be completed

Across Valencia lie the remains of three ancient fortifications built centuries apart: a Roman enclosure, an Islamic expansion, and a medieval Christian wall.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

With a facade that measures just 107 centimeters, this five-story building is one of the skinniest in Europe.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This house's itty bitty size means no humans allowed.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Covering 13 acres and hosting 3,000 shops, this is one of Africa's biggest urban markets.

A home for skateboarders with sweeping views of the Atlantic Ocean in Morocco.

An eerie former warehouse turned cistern turned movie set.

Enjoy fresh-baked bread and fish from a repurposed Portuguese fortress.

This museum is dedicated solely to this millennia-old handheld cooling device.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

One of the oldest libraries in the world is still operating and contains the oldest existing document in the Italian language.

A gorgeous example of 13th-century Gothic architecture.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Pilgrimage site for star-crossed lovers.

These elaborate gothic monuments honor Verona's medieval lords.

The last bastion of Roman presence north of the Alps looms over a German town.