Forest Hollow is the district that Meridian forgot, and that's exactly how its residents like it. The old Forest Glen was always Chicago's least densely populated community area — winding streets, large lots, a suburban feel that made no sense inside city limits. When the Corporate Reconstruction mapped GLMZ's zones, Forest Glen's low population density, minimal commercial value, and confusing street layout caused it to fall through the cracks of multiple corporate planning algorithms. It was assigned to no sovereign territory. It appeared on no development plan. It was, in the language of corporate logistics, a null zone — a place that existed in geographic space but not in administrative space. By the time anyone noticed the oversight, the residents had adapted to their invisible status and had no intention of being noticed.

The Hollow's winding streets — originally a product of the neighborhood following the contours of the North Branch river and the forest preserves — now serve as a natural labyrinth. Drone navigation struggles with the irregular grid. Surveillance coverage is patchy because the camera placement algorithms were designed for Meridian's standard block structure, not Forest Glen's organic curves. The tree canopy — maintained by residents who understand that overhead cover defeats satellite imaging — creates a green ceiling that makes the Hollow invisible from above. The forest preserve land, never developed and never formally acquired by any corporation, has grown wild, its paths known only to the Hollow's residents and the animals that have moved in as Meridian's development pushed wildlife to the margins.

What Forest Hollow does with its invisibility is a matter of some speculation among the few outsiders who know it exists. The truth is less dramatic than the rumors suggest: the Hollow is a community of roughly 3,000 people who live off the grid in the most literal sense. Power comes from solar panels hidden under tree cover. Water comes from wells tapping the old aquifer. Communication uses mesh networks that don't route through Axiom's infrastructure. The residents grow food, maintain their homes, educate their children, and ignore Meridian with the comprehensive commitment of people who've decided that the city's problems are not their problems. It's not paradise — the medical resources are primitive, the winters are brutal without corporate climate control, and the isolation can eat at you. But it's free, in a way that nowhere else in Meridian can claim to be.

The Hollow's relationship with the outside world is managed through a single controlled point of contact: a resident designated as the Interface, who handles all necessary interactions with neighboring districts and ensures that nothing about Forest Hollow enters any database, manifest, or conversation that corporate systems might parse. The current Interface is a woman in her fifties who worked for Axiom's surveillance division before she disappeared — officially dead, actually living in a bungalow surrounded by oak trees, making sure that the community that took her in stays invisible. She is very good at her job.