Atlantic Ocean
The Rhine River helps to form part of France's border on the eastern side of the country.
Spain is the only country to border Portugal to the east.
The Snake River forms part of Oregon's eastern border
The Mississippi River forms most of Arkansas's eastern border.
The Black Sea forms a small portion of the Eastern border of Europe. The Mediterranean is also part of the Southeastern border.
The Atlantic Ocean forms the eastern and southern border of New England.
The Atlantic Ocean forms most of the eastern border of these regions.
Eastern Border
Georgia's eastern border is the Atlantic Ocean
The Caspian sea forms Azerbaijan's eastern border.
The Rhine rises in Switzerland and also flows through Liechtenstein, Austria (it forms the border with Switzerland), Germany, France (where it forms the border with Germany) and the Netherlands.