Title: Great Sand Dunes Panorama

Image ID: 26

Location: Great Sand Dunes National Park & Preserve, Colorado

Tech: Canon 5D, 17mm, f/11, ISO 50, lens: Canon 17-40/f.4 L

Taken March 12, 2008. Unrelenting winds blow grains of sand across the 40-mile wide San Luis Valley and end up here, in the country's largest sandbox.

Title: Dream Lake Sunrise

Image ID:

Location: Rocky Mountain National Park, Colorado

Techy: Canon 5D, 17mm, f/11, ISO 50, lens: Canon 17-40/f.4 L

Taken April 14, 2007 @ 9am, Hallett Peak looms in center, a 70--foot granite wall is popular among climbers

Title: Sand Dunes and Mountains

Location: Great Sand Dunes National Park, Colorado

Techy: Sigma SD9, 100mm, f/11, ISO 200, Sigma 70-300 f/4-5.6 EX

Taken March 2003. Dunes and Sangre de Christo Range on the East side of the San Luis Valley make for a geologic conundrum.