The square ruin of the original Inverlochy Castle stands beside the River Lochy on the edge of town, a fine example of the Comyn-family castles of late-13th-century Scotland. Four round towers at the corners, a curtain wall enclosing a central courtyard — the layout is simple and powerful. The Comyns were broken in the Wars of Independence and the castle changed hands repeatedly thereafter; it was the site of two major battles, in 1431 and again in 1645 when Montrose won his most famous victory here for Charles I.
The castle is in the care of Historic Environment Scotland and is freely accessible. Not to be confused with the 19th-century Inverlochy Castle Hotel a few miles up the road, a baronial pile in its own forested grounds.