The “mega fortress” called Dmanisis Gora was built sometime between 1500BC and 500BC in the Caucasus region ... they used a drone to survey and map the region’s human-made features.

Parvin Darabadi, Caucasus and the Caspian in the World History and the 21st Century Geopolitics (Kavkaz i Kaspii v mirovoi istorii i geopolitika XXI veka) (Moscow: Izdatel'stvo Ves' Mir, 2010), 13. R.

A new drone survey has revealed that a 3000-year-old fortress in the Caucasus mountains is almost ... they used a drone to survey and map the region’s human-made features.