South  Korea, a modern and ancient country which belongs to East Asian nation on the southern half of the Korean  Peninsula, shares one of the world’s most heavily militarized borders  with North Korea.     Seoul’s  attractions include futuristic Dongdaemun Design Plaza, a curving  convention hall; Gyeongbokgung Palace, which once had more than 7,000  rooms; the ritzy Gangnam neighborhood; and Lotte World, an  indoor-outdoor amusement park.    To the north lies the Korean Demilitarized Zone (DMZ)  buffer zone  where visitors can feel Korean War and visit political facilities which hold official meeting between government of South, North Korea   In the south, the city of  Busan is known for the high-rise-lined Haeundae Beach and mountainside  Beomeosa Temple. The city of Gyeongju features royal tombs and an  observatory from the Silla dynasty. Jeju Island is a honeymoon  destination of beaches, waterfalls, volcanic craters and lava caves.     1. When To Visit South Korea    Most vis...