2. Mediterranean Sea: It is located to the south of Europe. The Mediterranean Sea is a major water boundary of Europe and has played a significant role in shaping the history, culture, and economy of the region. It connects Europe with Africa and Asia and has been an important trade route for centuries.
3. Arctic Ocean: It is located to the north of Europe. The Arctic Ocean is not as accessible as the Atlantic or Mediterranean, but it is still a significant water boundary of Europe. It is of great importance to the countries that border it, such as Norway, Russia, and Iceland.