The Art Deco artwork depicts gilded carriers of deadly illnesses.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

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

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

Dictionary Johnson’s favorite feline.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Eighty million natural history specimens call this gargantuan museum home.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

Go deep down into the earth to experience the world of Welsh coal miners.

The only medieval bridge in Britain with its defensive tower still in tact.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The world’s only museum dedicated to baked beans.

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

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The painting on an aptly named street honors the 1980s slasher movie.

The largest of only eight working transporter bridges left in the world.

One of the few surviving street funiculars in the world.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

Recently restored menagerie of Victorian-era beasts.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.