From the site of the Tracy-sur-Mer foundries, owned by the Conservatoire du Littoral and managed by the Department of Calvados, there is a unique view of the remains of the artificial port of Arromanches. Its code name: the Mulberry port, also called the Winston Churchill port. It was built to allow the transport of numerous materials and equipment for the Allied armies in the days following the D-Day landings. It was made up of various large elements prefabricated in England, transported and assembled on the Normandy coast. This artificial harbour has often been put forward as having allowed the success of the battle of Normandy.
Thus, in front of the cliffs of Tracy-sur-Mer, there were Phoenixes, huge reinforced concrete caissons, which completed the dike constituted by blockships, that is to say old warships weighted with concrete and sunk on the spot. The connection to the coast had been extended by the British with the help of boulders dug out of the cliffs. The cliffs were used as an ammunition storage area.
Facing the sea, the grasslands have a shorter vegetation and an interesting biodiversity with the presence of the woolly Cirse, several species of orchids: Fuchs' Orchid, Pyramidal Orchid, Bee Orchid, Goat Orchid and other rare plants such as the whitish Seneca.
The steep cliffs of Tracy and Manvieux are one of the most interesting sectors for the nesting of Herring Gulls and Northern Fulmar. Other species of interest include the Peregrine Falcon and the Common Raven.