Wittemoor timber trackway
The Wittemoor timber trackway is a log causeway or corduroy road across a bog at Neuenhuntdorf, part of the Berne in the district of Wesermarsch in Lower Saxony, Germany. Originating in the pre-Roman Iron Age, it is one of several such causeways which have been found in the North German Plain, particularly in the Weser-Ems region.
Source: Wikipedia — Wittemoor timber trackway (CC BY-SA 4.0)