Strange dream.

It's a hill in Northumberland. It has the prehistoric carvings (pistures posted on this site, which you will have seen) and burial cairns. It's just past the village of Longframlington, you pass it on your left as you follow the signs to Cragside House near Rothbury. Someone used to have a tepee there. Think it's gone now.

See also:
http://rockartuk.england.fotopic.net/c283946.html
and
http://www.magic.gov.uk/rsm/24660.pdf