Babel, City of Tides
Ok, I've got something. Tell me what you think. I've got more for this idea, I think.
During the events the brought the last age, the MegaCorp Light-Core found itself in a situation. A second rate shipping company, it found itself unable to compete with the giants of it's day. It set out with a project, shackling it's fate to the communication and solar generating satellites in the sky above. It set off to build the world's first space elevator; a tremendously tall tower, stretching to the heaven's above, able to quickly and cheaply catapult cargo into low orbit, from which it could easily corner the market on satellite technology. The project started, building proceeded smoothly, and then the end of the world came.
One of the first targets was the near-completed tower, though none alive know who fired at it. Though constructed on the Indian Subcontinent, it's towering primary spire, which soon earned the mocking nickname of Babel by the more powerful cooperations in the world, could be faintly seen from much of the Eastern Hemisphere. A weapon, some say a nuclear in nature, while others claim rail guns, nanites, or perhaps even a suicide run from an aerial craft, brought the elevator down. The lower levels were destroyed instantly, but the upper levels, caught in lower gravity above and the forces rippling up the superstructure from below, drifted out into the Indian Ocean, before crashing with a tremendous tidal wave.
The tower, built for the high stresses of planetary momentum and wind shear, some how survived. Part of the substructure crashed into the bottom of the sea, while the upper portions jut above. The tower has been since been found, and has become something of a bustling sea center, it's surface extending over miles of the Indian Ocean. Known as Babel, City of Tides, it takes on travelers, traders, and sailors of all sorts from Africa, the Arabian Peninsula, Southern Asia, and Australia, becoming an important sea based oasis.