This castle resides in a valley known for immense bloodshed during the Middle Ages.

A once extravagant mansion, now reduced to ruin.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

The remains of an anti-aircraft battery from World War II look out over Glasgow.

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

Scotland still bears an enormous scar of its Roman past.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

This abandoned hospital village was once viewed as an innovative way to deal with mental illness.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

This former school is now abandoned and a canvas for graffiti artists.

The abandoned buildings of a hospital that saw most of its activity during the World Wars.

If you fly into Edinburgh Airport, it's possible to spot this prehistoric site without even getting off the plane.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

A remnant of the Roman army's presence on the coast of Scotland.

An ancient stone with mysterious origins stands in a residential neighborhood.

This 16th-century close preserves an unusual piece of Edinburgh's transportation history.

The healing properties of this well attracted royals and commoners throughout the Middle Ages.

It's a mystery how these curious columns wound up in an Edinburgh suburb.

Enter this small nook and you'll be surrounded by 360 degrees of street art.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

This 16th-century house tells the city's history through old artifacts and quirky tales.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.