There are the remains of a Celtic 'Viereckschanze' (four-corner-rampart), located near Erbach, Baden-Württemberg, Germany.
Above the Danube valley near the town of Erbach is a well recognizable 'Viereckschanze' in the forest 'Ring'. Obviously, to the ancient times, the place is a good place to build a 'Viereckschanze', so a farm of a wealthy Celts. From here one could look down on the important trade route.
This Celtic legacy was found in 1972, then you dredged here the gravel out. First, they found a bronze sword, which dates from the period of about 600 BC. The sword can be seen today in the Castle Museum Erbach. This suggests that here the 'Hallstattkultur' was established, the beginnings of Celtic culture.
The 'Viereckschanze' is trapezoidal and rectangular south to north side. Exactly between the streets next to the junction is the former estate. With 94 meters, respectively 132 meters also called 'Keltenschanze' is quite large. The walls, especially at the corners are still good visible and represent a difference in height of about 1.50 meters. Especially on the south side of the trenches and ramparts have been leveled.
Where is the Celtic 'Viereckschanze'?
If you start from Erbach the 'Viereckschanze' is at the hill about 2.2 kilometers northwest. From 'Bach' go over 'Bacher Loch' in the forest, to the intersection of four roads on the mountain - then you stand in front.
source: [DE] website