Keep exploring

You decide to keep moving forward.

The sub glides on ahead into the dark unknown. As you keep going, you notice a light up ahead. At first, it was dim enough to make you think you were seeing things. It kept getting bigger and bigger until you could see where it was coming from.

It was a city. It was like seeing a large snow globe with buildings inside. If you didn't know any better, you'd say you found it. The lost city of Atlantis might just be right in front of you.

The headlights became unnecessary once you were close enough. You spent some time circling the perimeter of the snow globe city looking for an entrance. You think you discovered one, but it looked put together haphazardly and it was partially hidden. You also found an entrance that looked much more like an entrance with sliding doors and even an someone attending it.