What is the name of this city? (See Details)

Some days ago, my wife and I saw a segment on The History Channel about an ancient city that has recently been found in the Bay of Cambay in India under 150 feet of water. The ruins have been dated to between 9,000 and 9,500 years old. The city was huge, covering an area some 5 miles long by 2 miles wide. Most interestingly, it displayed stonework construction techniques that archeologists had thought were not know to humanity until some 5000 years later.

We were discussing the find and trying to remember the name of the sacred city mentioned in ancient Hindu religious texts that had, until now, always been assumed to be a myth. This find raises the question as to whether that sacred city was no myth, but was real, as it too was supposed to be in the area of the Bay of Cambay.

My question is what was the name of that Ancient Hindu religious center? I tried to google it, but couldn’t find the info I wanted. And this question about asking questions here made me think of asking Fluther for some help.