The castle still holds traces of the abandoned Roman fort it was built atop.

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

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

Three bridges straddle a stream, one stacked upon the other.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

A pagan tradition of draping trees with rags eerily lives on.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

A unique waterfall that some believe attracts the fairfolk.

One could not be blamed for literally walking all over this supposed landmark.

A series of three shiny letters mark the boundary of an old refuge for those being pursued by debt collectors.

A sweet symbol marks the place where torturous executions were once carried out.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

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

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