Mechanica

Upon arriving in Mechanica, the traveler finds no inhabitants, only the city itself, which is a single, immense engine. Seventeen bridges of iron lead over a moat of mercury to the outer ring, where gears the size of houses turn with the sound of grinding glaciers. The air is cold and smells of ozone and hot metal.

The city's purpose is measurement. Great brass arms rise and fall, not to mark the hours, but to tally the grains of dust that settle on their skin; copper weights descend on chains into profound darkness to test the planet's pull. Every structure is an instrument, calibrated to a law that has no author.

The traveler may search for the city's heart, for the central chamber where the prime mover sits, but there is none. Mechanica exists only to prove that it can exist, a system of perfect, interlocking proofs that has forgotten its own question.