The geography of South Korea is mostly dominated by water. South Korea is about one-fifth the size of North Korea and considerably less mountainous since it is a true peninsula.
South Korea is located in East Asia, on the southern half of the Korean Peninsula jutting out from the far east of the Asian land mass. The only country with a land border to South Korea is North Korea, lying to the north with 238 kilometres (148 mi) of border running along the Korean Demilitarized Zone. South Korea is mostly surrounded by water and has 2,413 kilometres (1,499 mi) of coast line along three seas. To the west is the Yellow Sea, to the south is the East China Sea, and to the east is Ulleung-do and Dok-do in the Sea of Korea (East Sea). Geographically, South Korea's land mass is approximately 100,032 square kilometres (38,623 sq mi).290 square kilometres (110 sq mi) of South Korea are occupied by water. The approximate coordinates are 37° North, 127° 30 East.