Baengnyeong Island is the westernmost point of South Korea. Travel time by boat to the island from Incheon is about four hours. Changsan Cape in Ryongyon, North Korea, can be seen from Baengnyeong on clear days.
Environment
The area is also rich in oceanic fauna and bird diversity. The Chinese egret, which is considered to be one of the fifty rarest birds in the world, can be found here. The area hosts a nature reserve for spotted seals, and they can be observed on the rocks and beaches. Seals occasionally attract predators such as the great white shark into the area. Finless porpoisees in adjacent waters are also curious and playful. The Incheon Coast Guard has been investigating illegal whaling targeting minke whales in the area.
Climate
Religion
Owing to the geographical location, Christianity went through Baengnyeong Island ahead of other Korean regions. After the Gabo Reform, Kim Seong-jin was exiled to this island, and the first church in Korea was established in 1896. There are ten churches on the island at the present time.
During the Korean War, the USAF designated the airfield on Paengyong-do as K-53. The island was defended by the West Coast Island Defense Task Unit composed of men of the 2d Korean Marine Corps Regiment under the direction of US Marines. In April 1951 Paengyong-do was used as a staging base for a mission to recover wreckage of a downed Mikoyan-Gurevich MiG-15 near the Chongchon River. On 17 April 1951 a USAF Sikorsky H-19 carried a US/South Korean team to the crash site and they photographed the wreck and removed the turbine blades, combustion chamber, exhaust pipe and horizontal stabilizer. The overloaded helicopter then flew the team and samples back to Paengyong-do where they were transferred onto an SA-16 and flown south for evaluation. The USAF established a communications interception site on the island in mid-1951 which was used to intercept Chinese military communications. In December 1951 two Sikorsky H-5s of the USAF 3d Air Rescue Squadron were based on the island and would forward deploy daily to Chodo Airport to operate search and rescue missions before being permanently deployed to Chodo in January 1952. The H-5s were later replaced by the more capable Sikorsky H-19, two of which were based at Chodo and one on Paengyong-do. On 12 November 1952 several aircraft, believed to be Po-2s, bombed the base in a night attack causing minimal damage. In January 2010, an artillery duel between South Korean ships and North Korean land artillery occurred near Baengnyeong.
The South Korean naval vessel ROKS Cheonan sank near the island on 26 March 2010. The 1,200 ton vessel broke in two pieces with nearly half the crew dying and a little more than half surviving. A multinational investigation concluded that a North Korean torpedo struck the ship.