On a remote Sutherland estate is the Scottish pyramid. The estate has belonged to the same family for centuries and they've always refused to let anyone onto the estate to take a closer look, preferring the role of custodians.

On a remote Sutherland estate is the Scottish pyramid. The estate has belonged to the same family for centuries and they've always refused to let anyone onto the estate to take a closer look, preferring the role of custodians. 

It gives of a heat signature which is totally off the scale and it's estimated to be exactly three times the size of the Great Pyramid of Giza. 

Once every 100 years, on the stroke of midnight, it gives off a piercing shriek which can be heard as far away as Thurso and a giant beam of light is emitted pointing straight into the night sky.