Over many generations,local inhabitants used hand tools to hollow out thousands of the freestanding tufa formations. These cave-like rooms, carved from the living rock, once sheltered Turkey's early Christians.
Don't always go by traehd depth. check the tire side walls for cracks.For me, im a very aggresive driver so i normally change tires once a year. Even if the traehd dept is good. Chances are your inner side walls have cracks.