Board Thread:Questions and Answers/@comment-29978304-20160915164101/@comment-70.233.106.212-20161005200743

I like to call them "enclosed terrain chunks". they're a good way to test new in-dovelopment fauna and/or flora without losing them to the crowd of naturally-spawned (in) flora/fauna. Another good use for them is to make your own cavern out of them. I commonly use the one closest to the lost river's tree cove and use the "dig" cheat to get large objects like a cyclops into it.