Smbataberd fortress

Smbataberd is a medieval fortress located upon the crest of a hill between the villages of Artabuynk and Yeghegis in the Vayots Dzor Province of Armenia. It may have existed as early as the 5th century or earlier, although other sources date it to the 9th to 11th centuries. Its large basalt walls have been well preserved, but much less remains of the structures inside the fortress. It served as the main fortress of the Armenian princes of Syunik when Yeghegis was the seat of the rulers of that province. It was further expanded in the 13th century under the Orbelian dynasty. It is now a notable tourist site in Vayots Dzor.

Source: Wikipedia