The remains at Dunadd of the fortress of the Scots, a royal centre of Dal Riata, are located to the south of the glen, on the edge of the Moine Mhòr ("Great Moss").
[3] The most visible feature of the Kilmartin Glen is the linear arrangement of cairns, running over three miles (five kilometres) south-by-southwest of the village.
At the centre were two cist burials, and finds recovered included a jet necklace and a decorated bowl.
The internal chamber, subdivided into four by floor slabs, is over 6m long, around 1.7m high, and 1.8m wide at its northern end, tapering to 1.5m.
Archaeological finds recovered from Nether Largie South include Neolithic pottery and arrowheads.
Alexander Thom toured this site with Magnus Magnusson in 1970 in a BBC television documentary called "Chronicle: Cracking the stone age code".
[10]Kilmartin Glen has "a remarkable concentration of some of the most impressive cup and ring decorated rock surfaces in Scotland".
They are found on natural rock surfaces at Achnabreck,[11] Cairnbaan,[12] Ballygowan,[13] and Baluachraig near Kilmichael Glassary.
[14] In May 2021, archaeologists announced the discovery of prehistoric ancient deer carvings thought to date to the Neolithic or Early Bronze Age inside Dunchraigaig Cairn.
Stone tools that were originally thought to be from the Mesolithic period, ending 3000 BC, are now believed to be from the neolithic or Bronze Age, but not related to the cist burials.