The Machine is the name of both a mechanism of potentially infinite size and the parallel dimension that contains it. Its age and origin is unknown, but various writings and archeological findings from across the galaxy imply it may be at hundreds of millions of years old, predating any known civilization.

All of The Machine is an interior space. No sky or ground can be found no matter how far one travels vertically. Gravity is inconsistent in both strength and direction, seemingly having no pattern to its pull although one must travel far to feel its effects shift. Temperature, air pressure, humidity, and air composition also varies.

The parts and mechanisms of The Machine vary greatly in size and function. Most common are gears and pistons, which range from intricate hand-sized parts to monolithic building-sized slabs of metal. Pulleys of chains, hydraulic pumps, and rotating shafts also populate the moving parts of The Machine, all connected and rarely stopping.

In sharp contrast to the metal machines are the pulsing masses of flesh. Veins, muscles, and walls of skin are found webbed between the machines, forming dark, wet tunnels. The flesh is a mix of red, purple, and blue; Essence, a thin blue fluid, flows through the veins in lieu of blood. Structures and spires of bone occupy some of the more empty areas.

Some areas of The Machine are very clustered, with only thin tunnels found between massive heaving machines. Some of these tunnels are comprised entirely of flesh, stretched skin around bulging, pulsing veins; others are more domestic hallways of metal grating and polished walls of black marble.

Other areas are vast and empty with thin metal bridges stretching over abyssal chasms of shadow, where moving machines and rolling chains are only barely visible in the distance.

Forests can be found within The Machine. Where Essence spills and dries, plant life of a great variety grows including moss, grass, vines, and trees.