Andy Porter, a local resident, claims to have photographed the unidentified flying object over him as he walked his dog.
The incident took place at around 4.30pm on 10 January.
Andy said: “Before it went dark I went walking with my dog as I do and I heard a strange humming sound. With the woods being very quiet, I looked around to see what it was and saw a strange silver disk flying relatively slowly above the trees.
“It didn’t have fancy lights like your typical UFO but did have a bulge at the top. I took out my Android quick and tried taking photos. I kept on clicking until it flew an opposite direction above the houses and out of sight.
Note how possible air disturbance surrounds this object
Way too high for a frisbee!
“There was no-one around me, and I’m sure this wasn’t a bird or a plane. Birds aren’t disk shaped, and a plane would have had lights and would not have been that low. It was either a UFO or a really good prank.”
Dog owners and joggers are frequent visitors to the woods, who use its pathways.
According to local history and English Heritage, Grimescar was used for its resources by the Romans and is a place of archaeological interest.
In 1958, a kiln was reportedly discovered in the woods by school pupils, which had operated as a tilery for a fort. It dated back to around 100AD.