Joelle's last walk
Boston Common is like a lush hole Boston's built itself around, a two-k. square of shiny trees and dripping limbs and green benches over wet grass.
Context
Early in the death-day walk: the city itself as an annulus — a ring of Boston built around a green void. Two paragraphs later the freebase gets described as what "no longer delimits and fills the hole." City, drug, self: rings around holes, all the way down.