Hydropolis

Walter Newell approached Namor the Sub-Mariner with the idea of rebuilding Dr. Dorcas’ research station into an undersea environment where both Atlanteans and humans could live in peace. He believed it could be successful with effort from both races and funding from Oracle, Namor’s company. Using Oracle’s funds, Hyrdro-Base was salvaged from the bottom and converted into a floating instrument platform. Newell, looking for an additional funding source, and Lt. Langstrom was assigned to help oversee the deployment of Navy resources. Construction of the undersea dome and city, initially going by the name Aquaria, began. Cost estimates were upwards of two billion dollars and a timeframe of several months was put into place. The construction endured attacks from undersea villains, monsters, and species alike; all valiantly fought off by Namor and his allies. Finally, Walter Newell christened the completed city Hydropolis, considering that a more appropriate name than Aquaria as that name had connotations to aquariums. The finished city contained a biosphere that was actually a sealed ecosystem, covering over six acres to support life for air-breathing species beneath the waves. The city's inhabitants celebrated. The biosphere is composed of porous, thermal gas, able to maximize heat from the weak sunlight penetrating the ocean's depths. But most of the energy is gathered from geothermal vents and tidal generators. The domed city is a sealed ecosystem containing over 500 species of plants, animals, and insects and it's capable of sustaining 6000 people. The tropical biome, one of many rooms that was set up to mimic a particular environment from earth, contains a tropical paradise lifted right from the Florida Everglades, with animal life, artificial rain, and a waterfall.