This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

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

The remains of the great moral philosopher reside in a university in London.

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

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.

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

Pop culture has helped to keep this iconic British building from being destroyed.

Traveling collection of amazing automata.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

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

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

The remains of Crystal Palace Great Exhibition of 1851.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Catacombs turned marketplace.

Remnants of a Victorian garden feature sitting in public woodland.

Hear the quietest sound from across the dome.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.