Flanking the lake on the eastern side, a pretty nature reserve known as Toscana Park forms a backdrop to Seeschloss Ort. This lakeside castle is believed to have been built on the ruins of a Roman fortress. It dates from 909 or earlier (rebuilt in the 17th century after a fire) and has a picturesque courtyard, a late-Gothic external staircase and sgraffito from 1578.