The "Kugelbunker"

Augusta Raurica Einstieg in einen Kugelbunker aus dem 2ten Weltkrieg Foto Michael Vock 02

This is not a Roman monument, but the entrance to a so-called “Kugel-Bunker” from the 2nd World War.
Today it serves as a control station for the orienteering run through Augusta Raurica.