For school I designed an observatory 210 meters deep in the water, in the Twilight zone. The design is based on a bioluminescend Beroe jellyfish.
You see drawings of how it would look outside, inside, a model that gives you an idea of how deep you would be and how massive the water around you is. And a diagram that shows what animals live there and that the vertical migration happens there.
The comic shows the experience of a visitor (me), that has no idea what to expect when she goes down the escalater only to then come to a wonderfull underwater world













