Tustan (Ukrainian: Тустань) was a Medieval cliff-side fortress-city and customs site of the 9th–16th centuries, an Old Rus' cliff-side defensive complex. Its remains are located in the Ukrainian Carpathians (Eastern Beskids), in the Skole district of the Lviv Oblast, near the village of Urych, southwards from the town of Boryslav and to the southern-east from the village of Skhidnytsia. The unique monument of history, archeology, architecture, and nature is situated amidst the woods of Pidhorodtsi Forestry and is part of the Tustan Site Museum. Tustan was a defence and administrative center as well as a customs site on the important salt route leading from Drohobych through Transcarpathia to Western Europe.