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

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

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

Eclectic final resting place of the controversial explorer.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

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

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

A network of concealed passageways lies within a busy London Underground station.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Traveling collection of amazing automata.

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

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Dictionary Johnson’s favorite feline.

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

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

London's smallest police station is barely the size of a phone booth.

Hear the quietest sound from across the dome.

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

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

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

A student driver's nightmare.