 | San Juan Mountains, Colorado - Alpine Lake and Meadow
Blue larkspur, yellow paintbrush, red mountain sorrel and delicate purple columbine flowers pepper the alpine meadow with color seen only in the summer.
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| White Mountain, New Hampshire - Alpine Zones
The highest peak in the Northeast, Mount Washington in New Hampshire features alpine meadows and shrub-like 'krummholz' habitat.
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| Lake Tahoe - Geology
Located on the border between California and Nevada, Lake Tahoe is the largest alpine lake in North America.
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| Mount Rainier, Washington - Glacier View
Pulled by the force of gravity, glaciers are rivers of ice that continually carve down mountainsides, altering the landscape.
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| Kayaking Alaska's Waters
The iceberg-filled waters of Alaska's fjords are the perfect place for a sea kayaking adventure.
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| Teaching Tourists at Le Conte Glacier
Tour guide Syd Wright takes pleasure in showing tourists the wonders of Le Conte glacier and teaching them something about Alaska along the way.
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| Alaska's Tracy Arm Fjord
Whales, eagles, seals and glaciers are only a few of the sights to behold on a trip by boat through the Tracy Arm Fjord.
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| The Des Moines River - Geography and Utilization
Learn about the glacial origins of Iowa's landscape, and how early and modern humans utilized the land where the Des Moines River is today.
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| Northwest Iowa Plains - Pilot Rock
Pilot Rock in northwestern Iowa was formed by a retreating glacier at the end of the last ice age.
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| The Mystery of Hanging Valley
The remains of a Little Sioux River floodplain raise the question of how the valley was formed.
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| Kettle Hole State Preserve
The Kettle Hole, formed as a huge chunk of glacial ice melted, leaving a large depression, is now managed by the Nature Conservancy.
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| Missoula Flood - Part 1
During the ice age, glacial ice dams across the Northwest caused rivers to flood on a massive scale, leaving topography that resembles a giant riverbed.
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| Missoula Flood - Part 2
The effects of the ice age floods across much of the Northwest can most readily be seen from the air.
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| Missoula Flood - Part 3
During the ice age, the Missoula Flood transported vast amounts of rich soil from eastern Washington to western Oregon.
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