http://www.altgelt.com | Denver/Boulder landscape design firm Altgelt & Associates is headed by award-winning landscape architect Tom Altgelt. Known for sustainable "green" landscape and garden design, Altgelt & Associates works in harmony with nature to create landscapes and gardens that create an experience of peace and tranquility. A full range of landscape features, including rock, water, fire, plant, and more, is available. Altgelt & Associates creates large and small, residential and commercial landscape designs.