West Thumb Geyser Basin
This is the last major series of geysers as you make you’re way south, through Yellowstone. It setting is lovely, right off Yellowstone Lake. As you make you’re way along the walkway, you’ll see dormant vents just below the surface of the Lake. There are more amazingly brilliant geysers here - especially Black Pool and Abyss Pool.
Midway Geyser Basin
This was probably by far my favorite. The colors were amazingly brilliant. And the size of the crowds did not disappoint, either. The star attraction by far is Grand Prismatic Geyser, with its myriad colors - it is utterly kaleidoscopic. There is Turquoise Pool (the first one you will encounter), Excelsior Geyser and Opal Pool, which both are brilliantly blue.
The greater Old Faithful geyser system consists of the Lower, Mid and Upper basins (the lower basin being the northernmost - go figure). They are all popular, with Old Faithful being especially popular. After seeing the sea of completely packed parking spaces in the Old Faithful parking lot, I decided to move on and do come back on another trip.
Lower Geyser Basin
The main geyser in lower geyser basin is Great Fountain Geyser. This is accessible off Firehole Lake Drive, a one-way road headed north.
Norris Geyser Basin
Heading south from Mammoth Hot Springs, the Norris Geyser basin is the first substantial series of geysers you come across. It consists of two large areas - the Porcelain Basin and the Back Basin. Both areas are accessed off of elevated boardwalks so that you don’t get burned by the geysers, which are spewing out a ton of heat.
Mammoth Hot Springs
Given the lack of rain, the springs seemed especially dry. And of course, the elk. The area is divided into the upper and lower terraces, with the upper being accessible only by car on a one-way loop, and the lower terraces accessed via an extensive series of boardwalks.
This is the recipe for what constitutes much of the western side of Yellowstone National Park. All thanks to the fact that much of Yellowstone is the caldera of a massive super volcano. Hopefully, it doesn’t erupt anytime soon as it would probably take out much of the western US with it, being a super volcano and all.