Perth and Kinross, GB
North Mains is a henge in Strathearn on Strathallan Estate between Crieff and Auchterarder in Perthshire, Scotland (not in the valley known as Strathallan). It was excavated in 1979 and the final report was published in 1983.
Listen to the audio guide for North Mains Free on WIP — starts by itself when you arrive, even with the screen off