Searches for Noah's Ark have been made from at least the time of Eusebius (c.275-339 CE) to the present day. Today, the practice is widely regarded as pseudoarchaeology. Various locations for the ark have been suggested but have never been confirmed. Search sites have included Durupınar site, a site on Mount Tendürek in eastern Turkey and Mount Ararat, but geological investigation of possible remains of the ark has only shown natural sedimentary formations.