Dutch architecture practice UNStudio and Australian firm Cox Architecture have unveiled “Green Spine,” their proposal for the $2-billion Southbank Precinct overhaul in Melbourne, Australia. Selected as part of a shortlist that includes the likes of BIG and OMA, UNStudio and Cox Architecture have envisioned a twisting, greenery-covered high-rise for the 6,191-square-meter Southbank by Beulah site.