About 220 m southwest of Horneburg 3 and Horneburg 4 lies a striking mound under a group of trees in the field. In the mound in a hollow is a stone cist, from which a 2 meter large capstone can be seen. The support stones of the chamber are not exposed. The capstone has a number of cup marks.
On the current map of the necropolis Daudieck the site is designated as station 7.
Visited May 2019