Cave

 Lobster

    

There are many types of caves, some are small and narrow, most likely stressful for a neophyte in these matters, and others are huge and spacious, with rooms reminiscent of the Christian catacombs of the first centuries, but most are medium in size. There are long and dangerous ones due to their many labyrinthine recesses and many others, perhaps most of the ones I know, are simple cavities that go deep into the pierced rock, and where the entrance is never out of sight.