giant caucasian wingnut tree pterocarya fraxinifolia, the oldest tree in the city park of graz, in autumn colors, styria region

attraction austria autumn autumnal beautiful blue bright colorful contrasts day destination environment europe fall famous foliage forest giant graz green landscape leaf light morning nature nobody old orange outdoor park person season sky stadtpark steiermark style styria sunlight sunny tourism travel tree trees unesco vibrant view vivid walnut warm weather wingnut yellow