Drummy is the home to the Blue Cairn and Corrachree kerb cairn as well as a number of hut circles, three of which I managed to find. Unfortunately others were covered in heather/ferns or in amongst boggy stuff. So basically follow the directions to Corrachree and then use your eyes. There is also a cairn with fallen monoliths but that was hidden from view on the day I visited, plus I was rather damp. There is always another day!