Corra Castle (also known as Corrax, Corax or Corehouse Castle) is a ruined 16th-century castle within the Corehouse Estate near New Lanark, Scotland. It overlooks Corra Linn, one of the four waterfalls which make up the Falls of Clyde. In 1967 it became a scheduled monument. The site was chosen because it was seen as being impregnable, as it is surrounded by sharp cliffs on three sides. It features a ha-ha as part of its design, offering an unobstructed view of the surrounding countryside.