alone cold crunch curve forest hike leaves pale path ramble snow trees Trek walk walking winter wood woods alp alps Chamonix glacier global warming ice mont blanc mountain mountains peak skiing summit vallée blanche bush countryside England February Great Britain hedge hill landscape natural nature rural silhouette slope snowy South Downs Sussex tree bird bridge dundee gull metal panorama rail railway river scotland seagull sky span stone Tay wall alpine chill colorado hills national park peaks rocky storm timberline vallée blanche amazing beautiful Bryce canyon christmas flash freeze freezing nice scenery sun white wow xmas xmasphoto2013