What is this? A sinkhole?
Given there is no raised rim around the hole, it is not meteorite crater.

It is difficult to be certain given the perspective view in the picture, but it appears to be sink hole, also known as a subsidence hole. More pictures of the area &amp; even an aerial view would help significantly.

If the region has a history of underground mining, the hole may be due to the collapse of underground openings resulting in subsidence on the surface.

If the is no history of mining in the region then an opening may have been created underground, by subterranean water sources and the surface material has subsided or sunk into the hole.

Another possibility is that the hole is a bomb crater produced by the military. This could occur if the site was used as a bombing range by the Turkish air force. Also, given the proximity of the area to Kurdish regions, another possibility is that a bomb could have been dropped during a battle with Kurdish or similar forces.