The oldest church in Inverness witnessed the brutal executions of many Scottish soldiers.

A dozen cast iron leopards stand guard along the length of Aberdeen's Union Bridge.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

The castle still holds traces of the abandoned Roman fort it was built atop.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

The secret medieval communication system will whisk your words above the noise of the crowd.

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

A new sculpture calls attention to climate change in the centuries-old city it threatens.

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

This unique structure allowed boats to bypass underwater mine barriers in the channel to enter the harbor.

A whimsical bridge adorned with decorative dragons.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

For two decades in the 13th century, the papacy operated from this palace in central Italy, which served as the site of the first—and longest—papal election conclave in history.

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

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.