The earliest known structures on Gillies Hill were built by Iron Age people over 2000 years ago. Two structures are known, what is currently called Wallstale Dun on the southern end of Touchadam Craig and Gillies Hill fort on the northwest end of the craig. From both the dun and the fort the countryside may be seen for miles providing line-of-sight connections to other duns and forts (Touch Muir's Castlehill Duns, the Baston Burn Duns, Wester Craigend Dun, etc.).