The Black Hill in South Lanarkshire is owned by the National Trust for Scotland.
The hill is 2 miles (3 km) east of Blackwood and looks down to the Clyde valley at Kirkfieldbank.
It peaks at a height of 290m (or 951 feet)[1] - and now has an ordnance survey triangulation point on top of the cairn.
Views include Goat Fell on the island of Arran and the Cobbler, Ben Lomond and parts of the Southern Highlands.
The site may have had spiritual significance for these early peoples, indeed it has been suggested that the cairn was built in line with the larger summit cairn on Tinto, and may have been used as a means of deciding the date of the Winter solstice.