https://opensimworld.com/hop/76639
Well, this is an unusual place. It used to be Clutterfly, and inside the buildings, all Clutterfly items (at least all those that Linda has actually parked at Clutterfly itself) are still available. But beyond that, it's packed with all other kinds of free stuff ranging from avatar equipment (skins, hair, also a lot of layer clothing) to furniture to Linda's pre-Clutterfly boxes to (mostly payware) animated hardcore porn pictures to freaking sci-fi paraphernalia and real-life space transport.
This makes La Tortuga stand out already. But there's more: Nudity is officially allowed on the entire sim. This seems like just a gimmick, for there is no beach, and what sex furniture there is is all showroom exhibits which the sim owner certainly does not want visitors to leave their body fluids on. But it's nice.
There's one catch, though, if you want to teleport to La Tortuga naked right away: La Tortuga is hosted at Kitely, and it's one of the sims that are shut down when they aren't used. If you want to teleport into La Tortuga, and it's offline, you have to wait until it is started up. You're fine when teleporting from within Kitely, but if you try to hypergrid into La Tortuga when it's offline, you end up at Kitely's General-rated transfer station. I'm not sure if you want to be naked there.
So if you want to be safe, do as follows:
Maybe it's fair to mention that some people can't be bothered to read a sim's description on OSW, so they don't know that nudity is allowed, and they may be disturbed by seeing naked avatars. This hasn't happened to me yet, but if someone complains, show them the description and tell them that if the sim is rated Adult and nudity is explicitly allowed, it's also to be expected. Oh, and advise them not to check out the upper floors of the tall building to the north.