The unexpectedly beloved remnants of a controversial thermal power plant.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

An early 20th-century bullring converted into a modern shopping center.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

This beautiful 150-year-old synagogue survived Italy's fascist period and the Second World War.

In this museum, visitors are invited to touch the art.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Venice's island of the dead.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Go inside to really appreciate this 500-year-old technological masterpiece.

Two stone columns flank the grand Venice square, but there were supposed to be three.

When this funny little building went up in the 19th century, most people thought it would simply fall over.

This fountain is dedicated to the workers who perished constructing the Fréjus Rail Tunnel.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A fake medieval village in the middle of Turin.