Five years ago , after a dozen years of searching , a team of archaeologists led by Dora Katsonopoulou of the Ancient Helike Society in Aigion , Greece , and Steven Soter , a geophysicist with New York University 's Center for Ancient Studies , said they had found the lost city -- not in the sea but on the coastal plain next to it , near Aigion , about 45 miles northwest of Corinth .