 Aerial overview: Rhonegletscher form the south in 1985: The glacier tongue still flows over the riegel near Bélvèdere (photo J. Alean). |  Aerial photo from a lower altitude, 28. August 2007: The tongue has now retreated from the riegel (visible on the lower right), and two major glacial lakes have developped (photo Bernhard Edmaier). |  Enlarged section from the previous photo showing some icbergs, the beginning of the river Rhone and a temporary bridge giving tourists access to an ice cave (upper right; photo Bernhard Edmaier). |  Another section in which the low evening sun highlights lake sediments re-worked by various temporary advance of the glacier tongue (lower left; photo Bernhard Edmaier). |