Imagination is always a great thing so I am really very happy to know about your biggest fantasy as well as I am happy that you always dream about that you are surrounded by forest in which there is a lot of technology which is providing you multiple basic facilities including education health care and not only you to everyone in that city as well as this is very craziest adventure to imagine that there is underwater city in which human and aquatic life both can survive.

Good luck in this engagement challenge