The island of Gaddtarmen (Hauensuoli) of Hango (Hanko), South-West Coast of Finland, forms a natural harbour on a sailing route in the east-west direction. Sailors have made more than 400 carvings on the rocks while waiting for favourable winds. The oldest drawings date 15th and 16th centuries. Most of the carvings decpict coats of arms of Swedish and Finnish gentry. The site is unique document relating to the history of the Baltic Sea. Gaddtarmen was submitted on tentative list of Unesco Wolrd Heritage Sites at 1990.