As part of Hitler's vaunted "Atlantic Wall" there were a number of larger and smaller obstacles assembled by the Germans to prevent landings on the beaches of France. Natural barriers of earth, rock, concrete walls, but mostly wood and metal were used to prevent the allied landing craft from getting a purchase on French soil.
Wooden ramps were designed to destroy incoming landing craft. The ramps were a simple design that consisted of wooden logs arranged so that the longer of the logs was angled upwards and supported by two (and sometimes four) shorter logs.
Pointed towards the beach, this configuration would flip over small craft and send their occupants into the cold water of the English Channel. Although mines were sometimes added to the tip of the longer log, exposure to salt water often corroded these explosives and they were not as effective as originally planned.
These will be useful for any modeller wishing to model the bleak expanses of wide beaches.