Ra's al-'Ayn Camps
Syria
The Ras al-Ayn camps (also Ras ul-Ain camps) were desert death camps near the city of Ras al-Ayn in northeastern Syria, where many Armenians were deported and slaughtered during the Armenian genocide. The site became "synonymous with Armenian suffering".
Prison data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).