This once-inaccessible wilderness today attracts thousands of visitors.
Tracy Arm Wilderness, Alaska
Icebergs in Alaska's Tongass National Forest.
Glaciation on display in Tierra del Fuego, Chile
Daniela Hohenwallner, a researcher with the Global Observation Research Initiative in Alpine Environments (GLORIA), charts how climate change is affecting the growth of mosses in the Austrian Alps. Learn more about Hohenwallner’s work, and the story behind the photo, by visiting Peter Essick’s blog
Man burning electronic waste
Because metals buyers won't accept copper wire until its plastic insulation is burned off, recycling workers like this young Ghanaian man are often exposed to harmful levels of toxic fumes and smoke. This 2008 image is from a National Geographic feature, “High Tech Trash”
Perito Moreno Glacier
The Perito Moreno Glacier in Argentina’s Los Glaciares National Park. Water pressure created by ice dams periodically causes spectacular ruptures in the Perito Moreno's glacial wall — events that draw thousands of tourists to the park each year.
Pines in the Ansel Adams Wilderness area.
Wathumba Creek, stained brown from forest carbon nutrients, flows into the sea off Fraser Island, Queensland, Australia. At 1,840 square kilometers, Fraser is the world’s largest sand island.
Fraser Island’s mineral-rich sands bind together to create dunes as high as 800 feet.