Be on the lookout for the symbolic insect all over the city.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

The medieval woodcut-style artwork chronicles life in medieval London.

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

One of the few surviving street funiculars in the world.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

An architectural oddity hides in plain sight on this iconic London bridge.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

Where serial killer Aileen Wuornos drank her last beer.

The quiet field that inspired one of the most famous songs of all time.

The Liverpool street made famous by the Beatles is real.

This aging storage facility is the world's largest brick warehouse.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

This bronze statue was dedicated to a 1966 Beatles hit.

Preserved behind glass, the ruins of a medieval building used to store human remains.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

One of Ireland's most infamous prisons for rebels including men, women and children.

A particularly disconcerting tribute to Irish martyrs.