Go to the park, without leaving your desk

Are you tired of the boring view from your desk? Why not visit one of the numerous webcams put up by the government?
Watch Mount St. Helens, the volcano has been slowly releasing lava for the past year: http://www.fs.fed.us/gpnf/volcanocams/msh/
Avoid the snow on the divide and check out the Black Canyon of the Gunnison online: http://www.nps.gov/blca/webvc/weather.htm
See the air pollution covering downtown Denver: http://apcd.state.co.us/psi/chpark.html
If your desk doesn't have a window, check out the weather outside in Boulder at: http://www.cdc.noaa.gov/Boulder/webcams/
And finally, if you want to explore webcams around the U.S. check out the National Park Service list at: http://www2.nature.nps.gov/air/webcams/ or the Department of Interior list at: http://www.doi.gov/webcam.html.