Turkey Volcanic tuff formation of rocks at Kilistra Glystra, St Pauls Way, Gokyurt, Turkey concealing early Christian cave churches and PreRoman cave dwellings, by Juergen RitterbachF1online Stock Photo - Afloimages
Volcanic tuff formation of rocks at Kilistra (Glystra), St Paul's Way, Gokyurt, Turkey concealing early Christian cave churches and Pre-Roman cave dwellings|, by Juergen Ritterbach/F1online