Gergesa

Gergesa, also Gergasa (Γέργεσα in Byzantine greek) or the Country of the Gergesenes, is a place on the eastern (Golan Heights) side of the Sea of Galilee located at some distance to the ancient Decapolis cities of Gadara and Gerasa.

In any event, the "country of the Gergesenes/Gadarenes/Gerasenes" in the New Testament Gospels refers to some location on the eastern shore of the Sea of Galilee.

Byzantine monks venerated a site a few kilometres north of Hippos on the lakeshore as the miracle's location.

It is the only place fitting Matthew's description, since it contains the only "steep bank" in the area descending to the shore of the lake.

That monastery was destroyed by the Sasanian military in 614, partially rebuilt, and finally levelled by the 749 Galilee earthquake.