Wideford Hill

 

Eastern wall of northern side-chamber.
Petrie found the opening to a passage in SE corner here (lower right) that ran for 2.5m to end in bedrock. There is a visible vertical joint centre photo, presumably
 where the walling  was made good in modern times, but note the lack of a large lintel stone anywhere in this wall. Every other opening in the cairn has a massive lintel
 stone to support the huge weight of masonry above it. As the cairn was intact upon opening it is hard to see why this one area of walling would have an unsupported
 hole in it big enough to crawl into.