Yellowstone National Park was established on March 1 of 1872 and the Park's attractions range from the largest and oldest public bison herd in the US to one of the largest concentrations of geothermal features in the World. The most celebrated geothermal features include Old Faithful Geyser and Grand Prismatic Spring.
You can see two of Yellowstone's Icon's in the below video as a Buffalo roams through the water discharged from Grand Prismatic Spring.
For those of you that don't live close by to Yellowstone you can visit the various webcams situated through out the park. Those webcams include one for Old Faithful, which also shows numerous other geysers in the Upper Geyser Basin or you can visit the Yellowstone Webcam page to see live webcam views of Mammoth Hot Springs the North Entrance of the Park and the Fire Lookout's from Mount Washburn.