Geothermal Resources talks about the geothermal features in the park, such as geysers, fumaroles/steam vents, and hot springs, how they are related to volcanic activity, and how humans affect the park’s features.
Yellowstone Digital Slide File gives several pictures of geothermal features in the park, such as mud pots, geysers, fumeroles, hot springs, mineral deposits, and algae.
The National Park Service's wildlife safety videos show why visitors should give the animals their space and stay away from them.
Information Every Visitor Needs to Know informs about precautions that people should take while visiting the park.
The Windows Into Wonderland website has several other virtual field trips about the history of Yellowstone, its wildlife, its geothermal features, and much more.
Yellowstone National Park's website gives information about the geothermal features of Yellowstone National Park.
National Park Service has a lot of information explaining how hot springs work.
The University of Utah's website on Yellowstone's hot spot describes the hot spot underneath the park, active faulting, and history of Yellowstone's volcanism.
