Fortress

Castle visible

Por-Bajin Fortress

Por-Bajin - stronghold in Eastern Siberia, built in the 8th cent BC. on an island of lake Tere-Hole. Some consider this stronghold to be a temple and call it 'Russian Shaolin'. Others believe that thi Read more

Roman fort

https://www.academia.edu/40686646/Travelling_between_the_Euphrates_and_the_Tigris_in_Late_Antiquity