Invisible Structures

Invisible Structures focuses on changing the world’s landscape. 

By Janice Hoppe-Spiers, Senior Editor at Knighthouse Publishing

In the early 1980s, before recycling and “green” products were on anyone’s radar, William Bohnhoff dared to dream of replacing certain concrete and asphalt applications to grass paving. Bohnhoff founded Invisible Structures in 1982 out of his garage in Aurora, Colo., creating the original version of the grass paving system which was simply PVC rings glued to mats.