Metzad Mahmal - Credit: Wikimedia Commons
Metzad Mahmal is the ruins of a stronghold located on the edge of the northern cliff of the Ramon Crater, at the top end of Ma'ale Mahmal (מעלה מחמל, "Mahmal Ascent") and is part of the Incense Route that runs between Petra and Avdat. Read more on Wikipedia
Source: en.wikipedia.org