We've got a new quiz for you today - super expert level stuff. Europe rivers, seas, straits, etc. all rolled into one monster quiz with 63 questions.
But if that's too much for you, this quiz is also customizable (for those with supporter or teacher accounts). Create a quiz of just the water around the Mediterranean, if that's what you need. And speaking of the Mediterranean, you can select just the Mediterranean, or select any of its seas to be individually asked in the quiz.