You are looking for coin sized round container with magnetic.
The geocache is located at near Bukchon Hanok Village.
Introduce about Bukchon Hanok Village
Surrounded by Gyeongbokgung Palace, Changdeokgung Palace and Jongmyo Shrine, Bukchon Hanok Village is home to hundreds of traditional houses called 'hanok' that date back to the Joseon Dynasty. The name, 'Bukchon,' which literally translates to 'northern village,' came about as the neighborhoods that the village covers lie to the north of the two significant Seoul landmarks, Cheonggyecheon Stream and Jongno.
Today, many of these hanoks operate as cultural centers, guesthouses, restaurants and tea houses, providing an opportunity to experience, learn and immerse in Korean traditional culture.
Bukchon 8View
"Bukchon 8 Views" is where people can fully enjoy the beauty of hanoks and the alleys in the area. Seoul has nominated eight different views and has set up "Photo Spots," from which you can easily find delight in the surroundings inside of Bukchon in order to develop the area as a Seoul’s most representative cultural tourist attraction.
Bukchon is a place where walking is strongly recommended. The alleys coil around like a maze, preserving traces of days long past. So why not have a look at Bukchon? You will certainly have a pleasant time while walking down the alleys of the Bukchon 8 Views.