Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

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

Charles Babbage's proto-computer, painstakingly brought to life.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

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

The Columbia Road Flower Market is now open every Sunday, rain or shine.

A house of bones — but nobody is quite sure to whom they belong.

The pioneer of psychoanalysis spent the final year of his life here, still seeing patients on that famous couch.

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

Traveling collection of amazing automata.

This 1920s Dutch barge is now a floating bookstore.

A 200-year-old prison that now houses a peculiar crime museum.

Fascinating town where normal life interfaces with the occult.

Collection dedicated to brands, packaging and advertising.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Dictionary Johnson’s favorite feline.

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

This hidden green space is the city's second largest conservatory.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Artists and musicians now rule over this former rail station.

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

Abstract dinosaur models in London.

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