Anyway, on one of my visits to Turkey, we stumbled across an excavated-but-abandoned archaeological site which had been flooded. The doorway arches loomed out of the water, and frogs were splashing around. I felt like I'd found Atlantis or something. But tunnels under the Hagia Sophia sounds so Byzantine!! [get it?]
I can't find the upcoming film of the expeditions at the site on IMDB yet, but according to the Hürriyet article,
His 50-minute documentary, “Ayasofya’nın Derinliklerinde” (In the Depths of Hagia Sophia), will compete at international festivals starting in the fall.