bridge cold december flow frost ice park snow tree trees walk water winter abstract artistic backdrop background blended blue bright colored colorful colors coloured colourful colours connected contoured contours contrast decorative design details distinctive edged edges ice-blue ice-flow ice-like ice-pack interconnected interlinked intermeshed light marble marbled marbling patterns perspectives shaped shapes style surfaces surfacing texture textures thick thin vibrant wallpaper white adventure alpine alpinism alps altitude dangerous decay Expedition exploration extreme glacier glaciology Graubünden hiking icy landscape Morteratsch mountain mountaineer mountaineering mountains nature outdoor path pathway recreation risk silhouette slope sport sports steep summit swiss switzerland terrain tour tourism Trek Trekking backpacking brave challenge climb climber climbing global holiday man warming change cliff cliffs climate edge melt melting ridge