In Star Wars, Coruscant is an 'ecumenopolis' - a city-covered planet. This city appears to be going in that direction. Pavement and concrete cover every speck of land except for a few gaps for ornamental trees.

There is an 'aquarium' where animals are imprisoned in an enormous concrete bunker full of machines. Vast resources are needed to maintain a semblance of their natural habitat. Cut off from real sunlight, rain and weather, artificial versions must be created, and at huge costs of money and human labor.

Visitors happily pay to see the prisoners in their expensive dungeons.