During discussion in the 'Windfarm Anyone' thread, it came to light that there is a prehistoric stone circle on the moors at the border between Oswaldtwistle and Haslingden.
Like many such monuments, little of it is left showing above ground, but an excavation may well reveal far more.
This is a link to 'Thirteen Stone Hill' which I googled for that thread
The Modern Antiquarian.com | UK | Thirteen Stones Hill (Stone Circle)