Explorable underwater cave systems span the Leonida coast

Our assessment

Unverified. A single account claims extensive explorable underwater cave networks, citing "internal testing footage" that nobody has produced. GTA 5 already had limited underwater exploration, so the idea is plausible, but plausible is not verified. No corroboration and no official material supports the specific claim. Rated Unverified. GTA 5 already included limited underwater exploration, so expanded cave systems are plausible in principle, but plausible is not evidence. With no corroboration and no official material, the specific claim stays Unverified until a credible source produces proof. We would upgrade this claim only on the strength of official footage or a credible leaker with a documented record, neither of which currently backs it. Until then, file this alongside the other single-source map rumours we are monitoring, and check the map guide for the claims that have actually earned a higher rating.