In 1963, Lake Powell was created by man in Utah's red-rock country. A recent scientific study concluded that it is shrinking faster than expected. Numbers mark parts of the photo. 4 is Padre Bay, the largest expanse of water; 7 marks where the lake continues upstream.
Malaspina Glacier emerges from the St. Elias Mountains of Alaska and the Yukon to flow across the Gulf of Alaska's coastal plain. The great mass of ice in this region results from the subarctic location of the tallest coastal mountain range on Earth.
(James S. Jackson)
Near the southern end of California's Central Valley, enormous fields (predominantly cotton) were reclaimed from the Tulare Lake Bed. Much of what was once the lake is now farmland.
Colorado and New Mexico share the Sangre de Cristo mountains. In a nook at the range's western foot, winds crossing the flat San Luis Valley pile up the sands of Colorado's Great Sand Dunes National Park. Pikes Peak is seen in distance.
Downtown Atlanta hosts a remarkably diverse array of facilities: Georgia's state capitol, the 1996 Olympic Games site, Georgia Tech, Coca-Cola's headquarters, and one of America's largest rail yards.
A glacier created Boston Harbor 15,000 years ago. The moving ice also created low hills called drumlins. As the glaciers melted and the sea level rose, the harbor was flooded, making each drumlin, including the one on which Logan International Airport sits, an island within the harbor.
The Bingham Canyon Mine in Utah is the largest man-made pit in the world, almost three miles across and three quarters of mile deep. It has produced more copper than any other mine in the world.
(James S. Jackson)
In Texas, the Caprock Escarpment marks the eastern margin of the Llano Estacado plateau in the southern High Plains. Eroded red plains to the east make for poor farming and grazing, while the plateau supports cotton farms and rich pastures.
The Union Pacific Bailey Yard in North Platte, Nebr., is the nation's largest rail yard, linking Wyoming coal mines with eastern states. The circular fields are formed by irrigators that water fields in a way that minimizes evaporation.
(National Agriculture Imagery Program of the USDA)
In the Illinois suburbs west of Chicago's main airports, a distinctive figure eight draws the eye to the large cyclotron, or circular particle accelerator, at Fermilab. This is one of the world's top two sites for research on the physics of subatomic particles.