Built by Andrew Ryan, Rapture sits at the bottom of the Atlantic Ocean, a metropolis of massive art deco-styledbuildings connected by a network of glass tunnels and a Bathysphere system, appearing to be the size of Manhattan New York, New York. The city is completely self-sustaining, and all of its electricity, food, water and air purification and defense system are powered by the vents in Hephaestus. Rapture is intentionally isolated from the world, and the only way to access it seems to be bathyspheres taken down from the lighthouse perched on an island above.
In terms of its philosophical underpinnings, Rapture can best be described as a “gulch,” a term derived from Galt’s Gulch in the Ayn Rand novel Atlas Shrugged. A “gulch” is a localized underground economic and social community of freedom-minded individuals and differs from a commune in that it is uniquely freedom-focused, and so upholds individual and property rights rather than operating by the rules of a collective community.