An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

The little-known second castle that William the Conqueror built in York.

An incredibly well-preserved piece of ninth-century Viking poop.

One of the shortest streets in York has an especially odd name.

This disused Cold War bunker has been restored to all of its early 60s glory.

This network of narrow, medieval passages has the most delightful name.

Ever hear of the Milazzo Cage?

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A huge enchanting public park just outside the ancient walls of Rome.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

Ancient ruins hidden underneath a modern luxury hotel.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Roman-era ships unearthed...

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

An enigmatic modern marker left next to a historic Roman site.

A modern sliver of architecture in Roma.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The Pope’s secret escape route.

A collection of objects supposedly singed by the hands of souls in purgatory.

A fairy tale castle in modern Rome.

Jesus' footprints and the first catacombs in the world.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.