The three first images show a lake and a glacier. The small brook from this lake flows under the glacier for about 250 meters and into the tiny lake shown here. During several years the ice above the brook melts to form a cave. After maybe 7–8 years the cave collapses and the process repeats. The entrances are, however, collapsed most of the time, but during some autumns following a warm summer you may visit Blåsalen ('The Blue Hall') shown here, or Speilsalen ('The Mirror Hall') in the north end.
(1996-09-22)

Comment 2009: This small glacier has been melting fast lately (Global Warming, you know), and this cave in not expected to appear in the near future.