Kiel is a port city in Germany located on the Baltic Sea. Riga is the capital of Latvia and is also located on the Baltic Sea. Gdansk is a port city in Poland located on the Baltic Sea. Estonia is a country located on the eastern coast of the Baltic Sea. Oder is a river that forms part of the border between Germany and Poland, and empties into the Baltic Sea. LETT is a port city in Lithuania located on the Baltic Sea. Ystad is a port city in Sweden located on the Baltic Sea. All of these locations are considered to be Baltic Sea ports.