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

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

Collection dedicated to brands, packaging and advertising.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

This foolish Victorian sea fort was converted to a deluxe hotel.

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

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

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

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

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

A student driver's nightmare.

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

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

A kaleidoscopic warehouse-maze of handmade neon signs.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This overlooked street light once served as a KGB dead letter box.

Every year locals tumble 650 feet down to the bottom of the hill chasing a Double Gloucester cheese.

Hidden beneath the streets of London is a secret subway that only carried mail.

The sign at the garden gate reads: "These Plants Can Kill."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

Visitors flock to see this church tower's unintended feature: It happens to resemble a giant chicken from multiple points of view.