Bit of a project

I have passed this many times on various journeys along the A9, not really sure how old or anything about it’s history, it Is very large and sitting on top of an equally large mound. I would assume it was a defensive castle or Manor House possibly a clan leaders abode.
Update:
Ruthven Barracks, just off the A9 near Kingussie, were built between 1719 and 1721 as a result of the Jacobite Rising of 1715. Occupying a strategic location on the road north through the Spey valley, the barracks were intended to discourage the Jacobite Highlanders from further insurrection. They stand on an enhanced glacial mound.