Grenzaa or Schoonebeker Diep is a river on the border of Lower Saxony, Germany and Drenthe, Netherlands, near the town Twist. It forms some of the border between the Netherlands and Germany. File:Schoonebeker Diep9.jpg File:Schoonebeker Diep.jpg File:Schoonebeker Diep3.jpg File:Schoonebeker Diep4.jpg File:Schoonebekerdiep6.jpg File:Schoonebeekerdi...