"Walk of Fire" Yellowstone National Park Grand Prismatic Spring | A couple traverses the boardwalk as the sun sets over Grand Prismatic Spring in Yellowstone National Park's Midway Geyser Basin on Saturday, June 1, 2013 | Signature Edition Print by Greg Dixon | Digital Photograph

"Walk of Fire" Yellowstone National Park Grand Prismatic Spring | A couple traverses the boardwalk as the sun sets over Grand Prismatic Spring in Yellowstone National Park's Midway Geyser Basin on Saturday, June 1, 2013 | Signature Edition Print by Greg Dixon | Digital Photograph

contact: greg@gregdixonphoto.com

© Greg Dixon Photo