There you will find examples of paintings by Russia's best late 19th century and early 20th century artists including the great Isaak Levitan (1860-1900) who died before reaching his 40th birthday. His Wikipedia entry is here and more biographical information is here.
By their nature, landscape paintings require less commentary that those dealing with people, so I'll simply let you examine some examples of Levitan's work below. However, let me note that he seems to have included water in his images where possible. Perhaps selecting scenes with water was one of his strategies to add viasual interest in the part of Russia where he lived and worked -- a land with no mountains.