This cache overlooks one of four crannogs on the Beauly Firth.
There are only 10 marine crannogs known in the UK.
All the Beauly Firth crannogs have been investigated, with the Redcastle Crannog having the most intensive excavation in the nineties. Wattle lined pits and substantial beams were found still showing adze marks along with skin and bones of various animals. It has been suggested that the site might have been used for butchery and the tanning of skins - which was a rather smelly business and best kept away from the homesteads.
The dyke to the west probably helped prevent erosion from the prevailing wind and waves and may also have been used to deflect the burn (stream) past the crannog.
On the foreshore adjacent to the layby are a couple of wattle lined 'test' pits made of hazel and alder, based on the evidence found at the crannog. These pits were used to help determine the methods used to stabilise the crannog's upright timbers in the mud.