Tong Pass, also known as Tongguan or Tungkwan, is a culturally significant historical pass located in Shaanxi Province.
Gonghuacheng is a historical castle ruin located in Shahe, China.
Shanhai Pass is a part of the eastern end of the Great Wall of China, serving as a strategic fortification.
Jiayu Pass is the first pass at the west end of the Great Wall of China, near the city of Jiayuguan in Gansu province.
Gwangju Castle is a historic fortress situated in the city of Gwangju, South Korea.
Buyeo Naseong, or the City Wall of Buyeo, provided protection for the capital of the Baekje Kingdom.
Haengjusanseong is an impressive historical fortress located in Haengju-dong.