This photochrome print of the military road and fortress in the Dariel Ravine (or Gorge) in the Caucasus is part of “Views of Architecture and Other Sites Primarily in Poland, Russia, and the Ukraine” from the catalog of the Detroit Publishing Company (1905). In 1799–1863, the Russian military constructed the 220-kilometer Georgian Military Highway through the Dariel Pass in the rugged Caucasus Mountains. The road stretched from Vladikavkaz in Russia to Tbilisi in eastern Georgia. The Dariel Fortress (or the Fortress of Vladikavkaz), at the northern end of the military road, was built in 1784, shortly after Russia’s conquest of the region.