ZenCam (something happens...or not): Old Faithful Geyser - Live!

"This full-motion, live-streaming webcam is located near Old Faithful Geyser and brings online visitors views of several other geysers in the area. When geysers such as Beehive, Lion, or Giantess are erupting, the camera will be aimed at them and zoomed in for optimal viewing enjoyment. When bison, elk, coyotes, or the occasional bear wander into the camera’s view, live video images will be transmitted." -- from the website.
<http://www.nps.gov