Hawaii Volcanoes
Earth’s Largest Mountains

Hawaii Volcanoes - Earth’s Largest Mountains
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Volcanoes of Alaska: Katmai and Lake Clark
Travel to Alaska to explore the vast national parks at Katmai and Lake Clark. Katmai was the site of the 20th century's largest volcanic eruption, while Lake Clark is unusual among national parks for having no roads and being accessible only by boat or small plane.
Great Smoky Mountains and Hot Springs
Survey some of the attractions that make the Great Smoky Mountains America's most visited national park. Investigate a related geological structure in the famous Hot Springs National Park, discovering why there are hot springs so far from volcanic activity.
Yellowstone’s Cataclysmic Origins and Future
Read the evidence in the rocks to discover Yellowstone's bigger story: the massive volcanic eruptions that created the region and will one day destroy it, the glaciers that shaped the terrain, and the meltwater floods that carved the impressive Grand Canyon of Yellowstone.
The Hawaiian Islands and Maui’s Haleakala
How does a barren volcanic landscape become a tropical paradise? Study the speed with which volcanic islands erode, leaving rich soil behind. Watch these processes at work on the Big Island of Hawaii, at Haleakala National Park on Maui, and also in the National Park of American Samoa.
Alaska’s Glacier Bay and Kenai Fjords
Continue your tour of the largest state with stops at two spectacular parks that are popular destinations for cruise ships: Glacier Bay and Kenai Fjords. Discover how glaciers form and examine their historical advance and retreat in this region. Also, learn how a glacier is like a candy bar!
Yosemite: Nature’s Cathedral
Survey the most beautiful valley on Earth: Yosemite. Even for those who have not yet visited, its views are iconic thanks to stunning photos by Ansel Adams and others. Investigate the geological history of the park, focusing on its most distinctive rock type--granite.
Acadia’s Highlands and Islands
The rocks of coastal Maine reveal a gripping legacy of lost oceans, colliding continents, epic mountains, furious volcanoes, and massive glaciers. Acadia National Park records evidence of all this, etched into its granite summits and boulder-strewn shores.
The Grand Canyon’s 2-Billion-Year Staircase
Descend into the Grand Canyon, recording the full sequence of strata from top to bottom--a story that takes you from 270-million-year-old limestone formed in a shallow sea to basement rocks that record a mountain-building saga from 1.7 billion years ago.
Montana’s Glacier and the Canadian Rockies
Journey to Glacier National Park, where the glaciers may be disappearing, but the impressive glacier-sculpted terrain remains.
The Colorado Rocky Mountains
Ascend the heights of the Rocky Mountains, asking how tectonic processes nearly a thousand miles away could possibly have raised this extensive range. Venture to Rocky Mountain National Park, Red Rocks, the Garden of the Gods, the Maroon Bells, and the Canadian Rockies.
Zion, Gunnison’s Black Canyon, Capitol Reef
Witness other wonders of canyon erosion on the Colorado Plateau, including the deep and narrow Black Canyon of the Gunnison, as well as The Narrows, a dramatic slot canyon in Zion National Park.
Yellowstone: Microcosm of the National Parks
Start your tour of the geological wonders of North America's national parks with Yellowstone, where the breathtaking landscape inspired the idea of a national park. Focus on the processes that produce Yellowstone's many geothermal formations, particularly its geysers.