Until after the Second World War, there were swimming baths on the island. Le Pecq was famous for two other establishments related to water: a spa exploiting springs on St-Germain hill and a natural water swimming pool which was 100 metres long with sand beaches.
Until after World War II, there were swimming pools on the island. Le Pecq was renowned for two other establishments connected to water: a spa utilizing springs on St-Germain hill and a natural pool with sand beaches that measured 100 meters in length.