Atlantian city-platforms

the city-platform is essentally a giant floating city designed both for submergence under deep seas and for flight in outer space. these platforms are a showcase for the atlantian's superior technology. they are armed with direct energy beam weapons capable of destroying entire cities. however, the use of such powerful weapons is taxing for the city platform's advanced energy source- a power source whose energy output rivals that of most nuclear power stations.
there are two bastions that either did or still makes the city-platforms.
the atlantian capital complex
and planet x