top view of the river waterfall. winter aerial view of a freezing river.

waterfall river aerial view top tosna rapids tosno winter leningrad region russia russian federation leningradskaya oblast sablino tosnensky district ulyanovka january landscape outdoor season wintertime climate change frosty cold weather freeze frozen snap snowy snow nature snowcovered water ice flow stream area watercourse white peat travel destinations tourism animal track trace trail step paw prints footprint footstep