Bury, GB
Castlesteads is an Iron Age promontory fort, situated on the east bank of the River Irwell on a natural promontory in Bury, Greater Manchester (grid reference SD79691299). It is listed as a scheduled monument. Excavated pottery indicates the site was occupied between 200BC and 250AD.
Listen to the audio guide for Castlesteads Free on WIP — starts by itself when you arrive, even with the screen off