The secret wartime bunker built on the platforms of an abandoned Tube station.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

The canine-themed book collection claims to be Europe's largest dog library.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

An archive of ceramic eggs painted to record clowns' personal makeup designs.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

A faded reminder of what was once a common sight in London during the Blitz.

The British monarchy's stamp collection is one of the most impressive in all of Europe revealing generations of royal nerdery.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

This London plaque marks the spot where David Bowie's famous alien made his debut.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A mysterious artist-run cabinet of curiosities and library.

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

The final resting place of a German diplomat's beloved companion.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

This historic London residence was once the womb of Scientology.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

This hospital helped pave the way for treatment that drove down child-mortality rates in 19th and 20th centuries.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

Giant, friendly pelicans in Central London, the most unlikely of places.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.