Without a guide, it would be near-impossible to find the ruins of al-Assirah, which is hidden among ancient oaks just outside the village of Beitillu. This is not a Sufi shrine or sanctuary, but a mosque that once formed part of an Ottoman military garrison. The building is in a state of near total collapse, but you can still make out the beautiful architecture of the dome and the windows. Take care here, and do not go inside the shell of the building – these walls could fall at any time.