Tags: Military Structure.
Castle Lachlan or Old Castle Lachlan is a ruined 15th-century castle on Loch Fyne Scotland. It was the stronghold of Clan MacLachlan until 1746 when it was attacked by British Government forces. New Castle Lachlan was built as a replacement in 1790 around 1 kilometre (0.62 mi) to the north-east.It is protected as a category A listed building and as a scheduled monument.