A research group from the University of Stuttgart is giving "tree house" a new meaning recently with the world's first tower made from living white willow trees.
I've seen benches and even umbrella stands made from manipulating living trees, but coaxing them into a building is a new one. The Baubotanik group--I love their name--focuses on understanding how botany can be used for construction.
The scientists planted the trees at the base in the soil, constructed a temporary steel scaffolding to support the growing trees, and placed a bunch of willows (in planters) throughout.
Over the course of five to 10 years the plan is for the trees to grow into a load-bearing structure that no longer needs the steel. The scientists hope that work on this tower will lead to safe and strong living structures.
If you're in Germany on September 19, you can go check it out for yourself, because the tower will be open for public viewing.