I want to live in 12beast world.
But to be more specific, a large mountainous island. One that has above/underwater caves for Spooder/Octopus girls. Large girls like Oni, Ogres, Trolls, or even 12Beast style Minotaurs could inhabit the caves and mountains. Even one or two Gigantesses. The island would have a healthy coast full of mermaid types.
Plenty of inland and sea bird Harpys. Maybe some Wyverns up in the mountains. All the various species that would fill in between the mountains and water would have to be there too.
Ah fuck it, all I'm doing is describing a smaller, geographically condensed Japan that way there is more forced interaction and accessibility to all the various types of Monster Girls.
Just call it a Haven that can never exist and go back to being alone and depressed.