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Lake Como in Lombardy, Italy, possesses a cryptodepression. One of the deepest lakes in Europe, its bottom is more than 200 metres (660 feet) below sea level.

crypto- (hidden) +‎ depression (area lower in topography than its surroundings).



cryptodepression (plural cryptodepressions)

  1. (geography, limnology) The portion of a lake which lies below sea level.
    • 1957, George Evelyn Hutchinson, A Treatise on Limnology: Geography, physics, and chemistry:
      When the bottom of the lake lies below mean sea level, it is said to occupy a cryptodepression, the depth of which is the depth below seal level of the deepest point of the basin.

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