Thank you, ChristOnABike (and can I just say how much I love your user name as I use that phrase daily). You're absolutely right. It was Saddleworth Moors wasn't it?
In that case, the area is actually rather equivalent to Symi in that Saddleworth Moors are around 29 Sq Miles. Obviously slightly different search terms as police were always looking for buried bodies in the case of the Moors.