A village in South Lanarkshire, Carstairs lies 4 miles (7 km) east of Lanark close to the site of the Roman fort of Castledykes. Chartered as a burgh of barony in 1765, its Tudor Gothic mansion, designed in 1821-24 by William Burn for Henry Monteith, became a nursing home in the 1970s. The mediaeval castle of Castleterrs, which belonged to the bishops of Glasgow, has disappeared but its church (1794) contains a 15th Century crucifixion stone. The village of Carstairs Junction was laid out in the 1840s for railway workers and lies 1 mile (2 km) southeast of Carstairs..
Nearby is the Roman fort of Castledykes.