Hauled from the water's depths, Henry VIII's flagship is preserved in this capsule-shaped museum.

Decrepit Victorian public lift is a white-knuckle ride.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

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

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

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

A five-story homage to tea times past.

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

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

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

This South London cemetery holds the remains of more than 15,000 people.

A quiet memorial to those who died saving others in the heart of the City of London.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

The signs of a long buried road can still be found hidden beneath a London sewer grate.

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

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

It is against the law to obstruct the view from the top of this English burial mound.

This preserved puppy was an adorable beacon of charity.

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