Dongnaeeupseong Fortress
Dongnae District, South Korea · built 1021
Dongnaeeupseong (Hanja) is a Goryeo-era Korean fortress in Dongnae District, Busan, South Korea. it is located on the mountain Maansan. The fortress was lived in and used for many centuries, with the exception of around the 17th to mid-18th centuries. It stopped being used in the mid-20th century. Now, it is a popular tourist attraction.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).