Napa River House in Napa, California by Craig Steely Architects
From Craig Steely Architects : The Napa River House is located on a site with mature oak trees and stone pathways winding down a gently sloping hill. To avoid disturbing the paths and root structure of the trees, a single footing and tube frame (inspired by a chairlift tower) will float the main living area in the oak canopy. For further detail visitCraig Steely Architects site.