It is a traditional Polish soup (Polish: zupa ogórkowa), my favourite soup. It is made out of sour, salted cucumbers and potatoes.
The recipe http://en.wikibooks.org/wiki/Transwiki:Zupa_ogorkowa
In French - soupe aux cornichons polonais
In Italian - minestra di cetrioli in salamoia
In Spanish - sopa de pepino
To see images of others participating in the "Food & Restaurants" challenge: http://forum.pbase.com/viewtopic.php?f=16&t=42043&sid