Marking the 20th anniversary of the first (1995) natural building colloquium at the Black Range Lodge in Kingston, New Mexico, Builders without Boarders and the Black Range Lodge, in cooperation with Cob Cottage Company, hosted the 2015 Natural Building Colloquium. The following photos paint a broad picture of the venue and workshops that took place. A special thanks to Ya-Yin LIN for all of her help in reaching the event and for some of the photos.