Dictionary Johnson’s favorite feline.

The final resting place to 300 Victorian-era pets hides inside the city park.

A historic arboretum and non-conformist, non-denominational park cemetery.

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

Scattered throughout London are ancient remnants of the city's former bounding wall.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

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

Catacombs turned marketplace.

An incarceration museum on the spot of possibly the oldest prison in England.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

"Purveyors of traditional sweets and vintage treats."

Repository for more than 22 million pickled specimens.

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

A student driver's nightmare.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

The remains of Crystal Palace Great Exhibition of 1851.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

Remnants of a Victorian garden feature sitting in public woodland.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

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

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.