By its proportions, the Poulains lighthouse is a lighthouse house located on the northwestern tip of Belle-île. It was built in 1868 in response to the strong increase in maritime traffic and to ensure the signalling of one of the most dangerous points for navigation, between Les Poulains and the tip of the Quiberon peninsula.
Today, the lighthouse hosts a permanent exhibition on the management of natural areas and can be visited as part of the unique heritage of the Pointe des Poulains with the Villa of the 5 parts of the World (which houses the Sarah Bernhardt museum space) and the Villa Lysiane, now the Maison du Littoral.