London, England
John Harrison's Marine Chronometers
The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.
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London, England
The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.
London, England
Explore nearly 400 years of English middle-class home life.
London, England
Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.
London, England
A clock designed to run with perfect accuracy for 10,000 years.
London, England
A relic of Victorian grandeur hides beneath a busy South London road.
London, England
This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.
London, England
A 1,215-foot tunnel transports pedestrians beneath the River Thames.
London, England
The perfectly preserved underground rooms where Churchill plotted the war against Germany.
London, England
Eighty million natural history specimens call this gargantuan museum home.
London, England
One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.
London, England
This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.
Paris, France
The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.
Paris, France
A large portion of this navigable canal runs under Paris's famed boulevards.
Paris, France
An underground tropical garden sits inside a Paris Métro Station.
Paris, France
The Argonaute submarine was the French navy's pride and joy in the 1950's.
Paris, France
Marvel at the opulent Art Nouveau interior while dining on dirt-cheap French classics.
Paris, France
Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.
Paris, France
Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.
Paris, France
A subterranean shelter remains intact under a busy Paris railway station.
Paris, France
Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.
Paris, France
France's national museum of scientific and industrial instruments.
Paris, France
High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.
Paris, France
A haunting collection of the vanished and disappearing natural world.
Paris, France
This modest marker near Notre Dame identifies the very center of Paris.