1) Asian river 2) City near Moscow 3) City or river near Moscow 4) City in Russia 5) City in Asia 6) City of Asia 7) City of Russia 8) European watercourse 9) European waterway 10) European river 11) River in Europe 12) River in Russia 13) River of Russia 14) River of Asia 15) River in Asia 16) Russian river 
[inhabited locality] Istra (Истра) is the name of two inhabited localities in Moscow Oblast, Russia. ...
Istra is a cultivated variety of potato.