Found this wonderful design via we-make-money-not-art. It’s a flexible, contracting pedestrian bridge by Thomas Heatherwick, which collapses upon itself to create an octagonal shape when not in use. It’s all hydraulics, and it looks fascinating.
He’s also currently working on an innovative Japanese buddhist temple design, based on folded/crumpled/draped fabric:
UPDATED: these additional photos from PingMag!