A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This one has sailed five times as far as Sir Francis Drake's famous ship.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

A open air theatre built on a cliff by an eccentric British woman.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

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

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

A kaleidoscopic warehouse-maze of handmade neon signs.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

An enormous public square and parade ground built to celebrate Ghana's independence.

The clever workshop that has been designing some of the most unusual coffins imaginable.

This grounded passenger jet is now a restaurant, complete with rows of seats and “flight attendant” servers.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Where the lovelorn find a home for their sentimental keepsakes.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The world's oldest map of the holy land gives us a fragmented glimpse of the layout of biblical nations.

An ancient capital city that dates back 3,000 years and harbors many surprises.

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

Eighty million natural history specimens call this gargantuan museum home.

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