Megacities

Megacities are vast cities that cover almost an entire country's worth of land, often also stretching far into the sky and below ground. Megacities often house hundreds of millions of people, the largest into the tens of billions.

Cities are often built incredibly quickly by use of an automated workforce and continuously expand outward in all directions as needed. Some cities have a designated purpose, but are used mostly to house the many billions of humans in the Orion Arm. Cities are mostly owned by corporations so heavy advertising and a large corporate presence is always expected.

Structure
While there is no real defined structure of a Megacity, many attributes can be appropriated to them. The use of extremely tall buildings, reaching the clouds that house an entire city's worth of people and are often self contained ecosystems.