Wikipedia
Ashdod-Sea
Ashdod-Yam (lit. "Ashdod on the Sea" in Hebrew) is an archaeological site on the Mediterranean coast of Israel. It is located in the southern part of the modern city of Ashdod, and about 5 kilometres northwest of Tel Ashdod where Ashdod stood in the time of the Philistines. Ashdod on the Sea and (inland) Ashdod were for most of their history two separate entities, connected though by close ties with each other. At different times in history one of the two twin towns would gain the upper hand over the other. There is more on the two towns and their interaction in the Ashdod article.
Most of the area has not been excavated yet and is covered by sand dunes.