An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

A memorial to Wellington's well-loved, well-traveled wharf dog.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

These ornate arches show how the course of the River Thames has changed.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Historic church where a number of Shakespeare's actors are buried.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

Murals of the wild parties once held on the frozen River Thames.

There's an exclusive Beefeaters pub hidden in the Tower of London.

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

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

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

A network of concealed passageways lies within a busy London Underground station.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

This luxury shopping lane has been protected by its own tiny police force for over a century.

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

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

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

Pop culture has helped to keep this iconic British building from being destroyed.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.