Quote Originally Posted by TheMightyMollusk View Post
It's entirely possible that there are Amaurotian ruins in the deep seas beyond Limsa too, but given that the sahagin of the Source are far more hostile to shorewalkers than the ondo of the First (and our lack of a giant fae whale to carry us down there), it's kinda hard to ask about it.
To build on this, remember the side quests in Amarout clearly imply there are other cities beyond Amarout. Even if Amarout ruins are never explored on the Source, other locations from this time period are still on the table.