A few more locations in my MutantBox.
The Tumbles- once a vast array of public housing for a thriving ancient metropolis they have all since collapsed. The curiosity of this mass of ruins is how it looks like they all slipped and tumbled over with entire sections seemingly more or less intact before being enshrouded in rubble and overgrown as they are now. It's been known for scavengers to simply be walking along a well used trail and fall into a stories deep space that suddenly opens beneath them. (some megadungeoning here)
The Merry Gloom River- and ancient river that has walked east and west of it's former route a number of times. It currently is lost somewhere in The Crack. Surprisingly enough most of the fish within the river are edible and most of the vegetables seem to be generally edible.
The Groves- A patch of forest once a large swath of suburbia which was washed clean of a great deal of waste by the Merry Gloom in years past before it settled in it's current banks. the groves have a lot of good fruit and hunting ;who is the hunted and the hunter can change from minute to minute of course. (a couple trees from The Groves can be seen in the northwest corner of the map shot)
Pleasant Valley Tech- a large technical college that has long been surrounded by multiple layers of security fencing and other defenses since the before times. Some claim the barriers have been expanding outwards in recent years. Nothing is known of those who may live there as all attempts to breach it's defenses have failed and there is no front doro to knock on. (Partially visible on the map shot posted previously on the western edge)
Dry River Bed- this stretch of ground used to be the course of the river that became the merry gloom. There is a brackish marsh where the sea still laps inland during high-tides. It's widely known to travelers and scavengers that the Dry River Bed is the hunting ground of a large pair of Goliaths.
The Last Bridge- an ancient superhighway bridge spans the Dry River Bed and can be seen for miles about. The population of avian mutants that nest here can prove to be a challenge for anyone trying to cross.
175th Street- an amazingly well preserved stretch of high-rises, office buildings and shops somehow survived the destruction of most of the city and what remains proves a draw for scavengers and beasts to this day. It's an eerie reminder of what was lost.