Celtic circular wall of Otzenhausen

The Celtic hill fort of Otzenhausen is one of the biggest fortifications the Celts ever constructed. It was built by the Treveri tribe, who lived in the region north of the fort. The fort is located on top of the Dollberg, a hill near Otzenhausen in Germany, about 695 m above sea level. The only visible remains are two circular earth ramparts, covered with stones.

Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).