An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

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

Public access to clean drinking water was an instant hit among the masses.

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

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

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

A student driver's nightmare.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

An arcade packed with a rotating collection of unique independent video games.

For 20 years, local pumpkins have met their fate on the iron fence surrounding this Cobble Hill home.

Historic Greenpoint theater, turned roller disco, now housing a chain pharmacy store.

Take in a rare, face-to-face glimpse of Lady Liberty at this tucked away Red Hook park.

A modern zoetrope on the New York City subway.

“Invented in Key West, Perfected in Brooklyn."

The last slot car racing arcade in Brooklyn is keeping the dream of speedy little autos alive.

Ride the subways of yesteryear.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.