A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

The largest greenhouse in the world is home to over one million types of plants.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

This failed condo development was reborn as a street art hub.

The unbelievably opulent home built for an infamous newspaperman.

World's first "penitentiary," meant to be humane, drove men insane.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

An avant-garde artist is survived by his seaside garden.

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

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

The bronze uniforms commemorate the vital role of women during World War II.

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

The broken skateboards that became a poignant memorial to a murdered skater.

The Tudor-style cottage in the middle of the square is not quite what it seems.

A wonderfully eclectic Victorian aquarium lies in the basement of the Horniman Museum.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

Abstract dinosaur models in London.

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