Ballochmyle cup and ring marks
The Ballochmyle cup and ring marks were first recorded at Ballochmyle (NS 5107 2552), Mauchline, East Ayrshire, Scotland in 1986, very unusually carved on a vertical red sandstone cliff face, forming one of the most extensive areas of such carvings as yet found in Britain. They have been designated a scheduled monument.
Source: Wikipedia — Ballochmyle cup and ring marks (CC BY-SA 4.0)