This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

The pockmarks across the building's facade are remnants of the Blitz.

The 20th-century archaeologist was interred among the ruins of an ancient Roman city.

This ancient Roman arch misled treasure hunters for centuries.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

A peculiar samurai statue overlooks the center of Brno.

This massive monument has been telling the time for 150 years—at a slight angle.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

This colorful statue welcomes visitors to a Barcelona park.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

This beautiful spit of land was once the summer playground of the king of Spain.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The only pub in the world surrounded by an ancient stone circle.

This two-legged horse statue celebrates a beloved cartoonist and his quirky characters.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

The commemorative stone column conceals a secret laboratory.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

An ancient ossuary in Rouen.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.