Tobna - Credit: Wikimedia Commons
Tobna (), also known by the ancient names of Tubunae or Thubunae, is a ruined former city in Batna Province of Algeria, located just south of the modern city of Barika. From this position, it once controlled the eastern part of the Hodna region, while M'Sila did the west. It flourished from the time of the Roman Empire through the Islamic Middle Ages, until it was sacked and destroyed by the Banu Hilal in the 11th century, after which it was finally abandoned. Read more on Wikipedia
Source: en.wikipedia.org