Enies Lobby: location of the lost civilization from the void century?

I was rewatching the Enies Lobby arc and it occurred to me that they describe the waterfall surrounding it to be an endless “hole in the ocean”. Knowing what we know about the destruction of Lulusia and how it looks post weapon attack, I think it’s possible Enies Lobby was the original site of the lost island. Would make sense that the WG would plop a heavily guarded judicial fortress on top of the site to stop anyone interested in the void century from getting too close.