PBS
Pbs Learning Media: Volcanic Features
This interactive resource adapted from the National Park Service illustrates the variety of landforms and features created by volcanoes. Featured are calderas, craters, fumaroles and other geothermal features, igneous rocks, lava flows,...
Other
Yellowstone National Park
Enjoy this award-winning site from Yellowstone Park, the Crossroads of the West. Plan your trip with their free "99 Things To Do in Yellowstone." Be sure to watch the movie "Yellowstone Park" for great sites and music!