Bridge that died in war and was resurected.

This ancient Roman aqueduct once funneled water to Diocletian's palace.

This fountain has a growing (animal) population, and might also be growing in size.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This tribute to the fictional detective stands at the famous literary character's address.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The Great Fire of London and the regulation of one-way streets both started in this alley.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

The commemorative stone column conceals a secret laboratory.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

A measuring mishap led to these artificial stone ladies losing their stomachs.

This Georgian mansion blends historical significance with an impressive art collection within picturesque surroundings.

In 1396, two Scottish clans that had been violently feuding for centuries finally faced off in a bloody battle in this park.

Now in ruins, this castle stood for centuries and saw a number of gruesome events.

An optical Illusion once believed to be an electrical phenomenon.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The oldest operating pharmacy in the world features 800-year-old recipes.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.