First, not yet quite perfect take on the Heinbockel megalithic tomb, situated near Stade, Lower Saxony, Germany. Only the southwestern end of the chambered tomb is still in situ.
For more information including a map and more pictures see https://de.wikipedia.org/wiki/Gro%C3%9Fsteingrab_Heinbockel and http://denkmale-entdecken.museen-stade.de (in German) or https://www.megalithic.co.uk/article.php?sid=18513 (in English).
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Recorded in April 2019. Image-based modeling done with Agisoft Metashape, subsequent post-processing done with Autodesk Meshmixer and Agisoft De-Lighter.