The wood is from this arsoned home that was destined to be torn down. She created this 'landscape' and really brought the space back to life in a way. The project is part of a nonprofit group called The Imagination Station. They are renovating two abandoned houses, one for a community media center and the other for an art studio. Catie did this cool little video on their site where she talks about the construction challenges as well as the unique charred surfaces. You should definitely check it out.
photos via Core77