Didn't it sink, Atlantis-style? The only reference to any extant survivors are notes that there might be a few tiny villages hidden in very remote areas, which you can find in the ethnicity description in the Inner Sea guide (or Humans of Golarion, I think).
There is also some stuff in Lost Cities of Golarion, but its mostly to do with the Sun Temple Colony. It still might prove useful though.
Azlant doesn't exist in the present day. It was destroyed by the Starstone's fall.
Er, that's not entirely true. If you look at the (admittedly inaccurate) map of Golarion on p. 204 of the Inner Sea World Guide, you can see that the continent is now largely under the Arcadian ocean, although there are lots of islands that jut out from underneath the waves.
Yes, this is specifically what I was referring to. Thank you for the ideas so far.
Very little has been released on the cluster of islands that now make up Azlant and what is beneath the oceans there. The Sun Temple Colony and the island of Mordant Spire have been explored a tiny bit, but not in any great detail.
