| Thousands of planes leave Venice's Marco Polo Airport every year, flying north over corn and soybean fields before turning out over the Adriatic Sea. But until a University of Padua geology team combined aerial photographs, satellite images, and a digital terrain model of the area seven miles from the airport, no one had seen Altinum, an ancient Roman city that lies only five feet below the surface. More. Labels: altinum, dig, italy, roman empire |