<strong>Mount St. Helens National Volcanic Monument, Washington: </strong>A cataclysmic eruption in 1980 put the spotlight on this spectacular volcano that had been dormant for more than 120 years.
Mount St. Helens National Volcanic Monument, Washington: A cataclysmic eruption in 1980 put the spotlight on this spectacular volcano that had been dormant for more than 120 years.
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<strong>St. Marks National Wildlife Refuge, Florida:</strong> Spanning 43 miles of north Florida's Gulf Coast, this refuge revolves around bays and bayous flanked by coastal grasslands and forest.
St. Marks National Wildlife Refuge, Florida: Spanning 43 miles of north Florida's Gulf Coast, this refuge revolves around bays and bayous flanked by coastal grasslands and forest.
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<strong>Nā Pali Coast, Hawaii: </strong>Sheltered by a series of contiguous state parks, natural areas and forest reserves, Nā Pali and Waimea Canyon in Kauaʻi are a haven for many rare plants and birds.
Nā Pali Coast, Hawaii: Sheltered by a series of contiguous state parks, natural areas and forest reserves, Nā Pali and Waimea Canyon in Kauaʻi are a haven for many rare plants and birds.
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<strong>Grand Staircase-Escalante National Monument, Utah: </strong>Devil's Garden is easily reached by road, but this vast area holds many more opportunities for hiking, mountain biking and canyoneering.
Grand Staircase-Escalante National Monument, Utah: Devil's Garden is easily reached by road, but this vast area holds many more opportunities for hiking, mountain biking and canyoneering.
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<strong>Wood-Tikchik State Park, Alaska:</strong> Covering 1.6 million acres, this western Alaska reserve is the nation's largest and most remote state park.
Wood-Tikchik State Park, Alaska: Covering 1.6 million acres, this western Alaska reserve is the nation's largest and most remote state park.
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<strong>Baxter State Park, Maine: </strong>This state park boasts Maine's highest peak, 5,269-foot Mount Katahdin, and the northern terminus of the Appalachian Trail.
Baxter State Park, Maine: This state park boasts Maine's highest peak, 5,269-foot Mount Katahdin, and the northern terminus of the Appalachian Trail.
Jerry Monkman/Aurora Photos/Cavan Images/Getty Images
<strong>Vermilion Cliffs National Monument, Arizona: </strong>The Wave is one of the most visited spots in this remote wilderness in Arizona.
Vermilion Cliffs National Monument, Arizona: The Wave is one of the most visited spots in this remote wilderness in Arizona.
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<strong>Salmon-Challis National Forest, Idaho: </strong>A remote mountain region with epic wild rivers is sheltered in part in Salmon-Challis National Forest.
Salmon-Challis National Forest, Idaho: A remote mountain region with epic wild rivers is sheltered in part in Salmon-Challis National Forest.
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<strong>Lost Coast, California: </strong>This coastal stretch in northern California offers a vision of what Big Sur would be like if Highway 1 had never existed.
Lost Coast, California: This coastal stretch in northern California offers a vision of what Big Sur would be like if Highway 1 had never existed.
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<strong>Camp Hale-Continental Divide National Monument, Colorado: </strong>Soldiers of the 10th Mountain Division trained in the harsh, wintry conditions of the Rocky Mountains in preparation for World War II battles.
Camp Hale-Continental Divide National Monument, Colorado: Soldiers of the 10th Mountain Division trained in the harsh, wintry conditions of the Rocky Mountains in preparation for World War II battles.
Thomas Peipert /AP