Tom an Tigh Mhoir is a medieval earthwork flat-topped motte, possibly founded by a Chief of Clan Donnachaidh. Strangely there is only a partial ditch, which starts on the south slope of the Garry River and finishes in a rounded end in the middle of the south side of the mound. There is also nothing to show that a ditch was ever dug on the remaining south and east sides, so the mound could also be defined as a Moot Hill. On the mound is some form of relatively modern rectilinear structure and the foundations of a wall also runs down the south slope. The slight bank on the counterscarp of the ditch on the west side, is probably a result of ploughing and the massive stonework which raises the summit at the north-west angle, is possibly modern levelling. 4 miles east is Blair Castle and 30 miles north is Ruthven Barracks.