This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

A subterranean playground in an abandoned slate mine.

This antique prison is a tourist attraction with a sordid past.

These medieval tunnels provided water to the city above through centuries of civil war and plague.

The fountain marks the area where hundreds of accused witches were burned at the stake.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This early version of the guillotine was used to execute the man responsible for its construction.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The oldest house in Glasgow is now a museum dedicated to the city's medieval history.

A 18th century graveyard and its astonishing cortege of macabre iconography.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This series of Scottish caves has no clear purpose other than baffling historians.

Remnants of an exploded schooner and wrecked submarines form a breakwater.