this place is geographically a moraine from the last iceage situated in the hills of the Teutoburger Wald. Where once a river was only a pond remained. Early tribes living there observed the sky and noticed that the sun apperared at certain points during the season and carved a whole there. Since the place has some mystic atmopshere it also attracts all kinds of people for meditation and strange rites.
Olympus EM5 on monopod with Summilux 15 mm panorama stitched from 2 pictures