Lindsay Tower - Crawford Castle (remains of)

Crawford Castle, substantially in ruins, is located on the north bank of the River Clyde, around 1⁄2 mile north of Crawford, South Lanarkshire, Scotland. The ruins stand on an earlier motte and bailey earthwork. The castle is also known as Lindsay Tower, after its former owners, the Lindsay family. The strategic location of the castle, at NS954213, guards the strategically important Mennock Pass from England into the upper Clyde Valley.

Source: Wikipedia