Figure 2.12. Crested Pool Infrared Overlay. Move your mouse over the image to compare infrared and visible images of Crested Pool of hot water near Castle Geyser in the Old Faithful area of Yellowstone National Park in Wyoming, USA. The false colors of the infrared image represent the intensity of the infrared radiation, which is directly related to the temperatures of the pool water and surrounding ground. Temperatures in °F are indicated on the infrared image for two points. The photograph and infrared image were taken by Dave Krueger of the National Park Service (see image on NPS page.)