The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

A solemn memorial in a majestic setting that honors a 1692 tragedy.

Nestled amid the peaks and lochs of the Scottish Highlands, this inn and pub has played host to outlaws and ghosts.

This triangular castle was besieged at least four times and shows many of the scars of defeat

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

A solitary arbor with a unique pedigree.

This exhibition covers a dangerous period in world history.

At Bank station, the tunneling shield that built the original Waterloo & City line tunnel is hiding in plain sight

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

Some believe that the stone once used to coronate Scottish kings resides inside this bar.

A rare example of traditional ‘common’ Highlands housing from the 18th century, with minimal changes and a potential murder scene

A relic from ancient Egypt that is purported to have a curse associated with it

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

The curios of pharmacist and collector Henry Wellcome.

Tucked away in a London Tube station, this 1920s linear clock shows the time across the world all at once.

The purported midpoint in London from which all distances are measured has a tragic love story at its core

William Smith's iconic "map that changed the world" is hidden behind a curtain in the Geological Society building.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

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

The ruins of a once-mighty medieval palace are hidden away in otherwise modern London

The ground on which Shakespeare’s initial playhouse once stood.

The London statue that imitates passersby.

This tribute to the fictional detective stands at the famous literary character's address.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.