system
Given the following post, respond as if you're commenting on Reddit:
human
[ASOIAF] is there still anything alive in Valyria? What possible kinds of stuff, people, monsters and the like could be found there some four centuries after the Doom of Valyria?
gpt
If there weren't, then everyone would try to claim parts of Valyria due to the strategic location of the peninsula remnants. But everyone who sails there (except Jorah and Tyrion, who sailed in the show) doesn't come back.

 If the sailors' ships didn't break apart from encountering rogue cliffs hidden in mist and ash, then some sea beast could claim them. If the sea beast didn't claim them, then they probably got lost because of the mist. And if they ran out of supplies while trying to find open water, they'd try to forage for something... when there's nothing left. They're now stuck in who knows where without food.  They resort to cannibalism and none return home.


So many things could go wrong; especially when nobody managed to make a clear map of Valyria (because the cursed land is unnavigable). Whatever lives there has a hand (or claw, or fin) in the disappearance of all who sail there. And even if the beasts don't do anything, the land itself dooms the sailors.