[OHelix]

Well, the answer to your original question is “Maybe... Maybe not.”

1 - Maybe there was only that site made of durable construction
2 - Maybe there was more but it has not been found
3 - Maybe there was more but it was destroyed

I certainly don’t question Pompei because there are no similar structures on Mt Vesuvius.

Regardless, the suggestion that the absence of similar finds nearby invalidates the one find seems illogical to me.

[sit-rep]

I would imagine that these areas of sunken cities, if it wasnt caused by raising water levels after the ice age(Which I do not believe) I imagine the tsunamis from massive Plates dropping into the ocean(Which for most I believe) would seriously wipe out any above sea level structures for several miles inland... no matter the elevation. that could very well be the reason there are no matching structures around “Town”...