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Joshua Tree National Park, California
Published January 29, 2009
Three topographic and climatic zones converge in California’s Joshua Tree National Park, enriching the park’s biodiversity. The diverse terrain is shown in this Landsat image from May 28, 2003.
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Red Rocks in Glacier National Park
Published August 21, 2008
Geologically recent events sculpted the rocks of Glacier National Park into sharp mountain peaks and steep-walled valleys.
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Zion Canyon, Utah
Published May 26, 2008
Located in southwestern Utah along the western margin of the Colorado Plateau, the park was established in 1919 after roadway improvements allowed access to the Mukuntuweap National Monument.
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Island in the Sky, Canyonlands National Park
Published January 3, 2008
This park in Utah encompasses some of the most remote and rugged terrain in the continental United States.
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Capitol Reef National Park, Utah
Published October 3, 2007
Sixty million years of erosion have exposed folded layers of rock.
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Valley Forge, Pennsylvania
Published May 27, 2007
No battles were fought here, but it was still one of the most important landmarks of the American Revolution.
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Voyageurs National Park
Published October 1, 2006
Established in 1975, the park saw fur traders nearly two centuries earlier, and it supported human inhabitants thousands of years before that. Today, almost a third of the park is water, and travel through the park is usually by boat.
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Crater Lake, Oregon
Published September 18, 2006
Crater Lake is formed from the caldera of Mount Mazama. Part of the Cascades volcanic chain, Mount Mazama sits between the Three Sisters volcanoes to the north and Mount Shasta to the south. The catastrophic eruption of Mount Mazama that occurred approximately 7,700 years ago destroyed the volcano while simultaneously forming the basin for Crater Lake. Eruptive activity continued in the region for perhaps a few hundred years after the major eruption. Evidence of this activity lingers in volcanic rocks, lava flows, and domes beneath the lake surface; the small cone of Wizard Island is the only visible portion of these younger rocks. Although considered a dormant volcano, Crater Lake is part of the United States Geological Survey Cascades Volcano Observatory seismic monitoring network.
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Land Between The Lakes
Published July 16, 2006
President Kennedy designated this area a National Recreation Area in 1963 as a demonstration site to explore how an area with limited value for agricultural or timber harvesting and no major industrial activity could be transformed into an economically productive recreation area.
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Bryce Canyon National Park
Published June 25, 2006
The park sits at the eastern edge of the Paunsaugant Plateau, and the ridgeline offers stunning views across southern Utah.
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San Francisco Peaks Volcano Field
Published May 23, 2006
Northern Arizona is best known for the Grand Canyon. Less widely known are the hundreds of geologically young volcanoes scattered across the southern portion of the Colorado Plateau at the eastern foothills of the San Francisco Peaks.
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Pinnacles National Monument
Published May 14, 2006
The landscape was formed as wind, water, and earthquakes carved away a 23-million-year-old volcano.