This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.

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

The artwork mysteriously appeared within an Edinburgh cemetery.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

A musical instrument played by the sea.

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

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

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

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

This display showcases the culinary equivalent of steel-toe boots during World War I.

The sculpture of the deceased cockatoo flops atop its personal plinth.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

The Tudor-style cottage in the middle of the square is not quite what it seems.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Formerly known as Saville Theatre, this mid-20th-century entertainment hub includes an ornate frieze.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

This overlooked street light once served as a KGB dead letter box.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

This five-star hotel was originally a swanky parking garage.