What a cool idea, Jo! You've already pasted my favorite, Old Faithful, it has a bunch of great memories for me.

Also at Yellowstone is the Mammoth Hot Springs cam:
http://www.nps.gov/archive/yell/tour...ammothcam2.htm

There is also the FishEye cam out of Coral Gables, FL:
http://www.FisheyeView.com/FVCam.html

Here is Niagra Falls:
http://camping.about.com/gi/o.htm?zi...lls_Webcam.htm

Crater Lake NP in Oregon:
http://www.craterlakelodges.com/pres...-818_1394.html

The Rocky Mountains' Kawuneeche Valley cam:
http://ns.www.nps.gov.edgesuite.net/.../grlk_cam.html

Man, there are just so many!