Old Lachlan Castle

Old Castle Lachlan, also known as Castle Lachlan, is a ruined 15th-century castle on the shore of Loch Fyne, within the Cowal Peninsula, in Argyll and Bute, Scotland. It was probably built by Clan Maclachlan on lands first recorded in 1314 as "Castlelachlan". Nothing remains of this fourteenth-century castle. Instead, the enclosure of Old Castle Lachlan appears to date to the early fifteenth century, whilst the internal buildings seem to date to the later part of the century. The castle remained a residence of the clan's chiefs until New Castle Lachlan was built as a replacement in 1790, 0.8 kilometres east-north-east. ()