Douglas Castle is a historic fortress located in the village of Douglas in South Lanarkshire, Scotland. Originally built in the 13th century, it served as the stronghold of the Douglas family, a prominent noble lineage in Scottish history. The castle has undergone various renovations and changes over the centuries, reflecting different architectural styles. The castle is situated on a hill overlooking the River Douglas, providing strategic advantages in its early days. Although much of the original structure is now in ruins, it remains a significant landmark and a popular site for visitors interested in Scotland's medieval history.