Korea consists of a peninsula and nearby islands located in East Asia. The peninsula extends southwards for about 1,100 km (680 mi) from Asia into the Pacific Ocean and is surrounded by the Sea of Japan (East Sea) to the east and the Yellow Sea (West Sea) to the west, the Korea Strait connecting the two bodies of water. To the northwest, the Amnok River separates Korea from China and to the northeast, the Duman River separates it from China and Russia. Notable islands include Jeju Island, Ulleung Island, Dokdo. And since 1945, it has been divided between two countries at or near the 38th parallel, North Korea (the Democratic People's Republic of Korea) and South Korea (the Republic of Korea).

References: https://en.wikipedia.org/wiki/Korea

https://maps.lib.utexas.edu/maps/korea.html#country.html