GREG DIMIJIAN / SCIENCE PHOTO LIBRARY GREG DIMIJIAN / SCIENCE PHOTO LIBRARY
Wall Street, a narrow slot canyon in Bryce Canyon National Park, Utah, with towering Douglas Firs reaching for the light. The two in the centre of the photograph, each over 750 years old, have lost their lower branches because of the deep shade in the canyon. Cliffs are composed of red Navajo sandstone. October 24, 2011.
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