Yellowstone is not just the first national park in the United States. It is also the world’s first national park. Yellowstone is also one of the most unique national parks in the world. Because it lies on top of a super-volcano, the area is literally a hotbed of geothermal activity. The West Thumb Geyser Basin is located on the shores of Yellowstone Lake. Although this is one of the smallest geyser basins in Yellowstone, it does contain a well-known geothermal feature, the Fishing Cone Geyser. There is also a spot in Yellowstone Lake’s Mary Bay where water temperatures of 252 degrees F have been recorded. Visitors who want to stay near this lake should book their accommodations at either the Lake Yellowstone Hotel, which was originally built in 1891, or the Lake Lodge Cabins. The Norris Geyser Basin is the oldest in Yellowstone. It is also the hottest and contains rare acid geysers. Norris is divided into two sections, the Porcelain Basin and the Back Basin. At Mammoth Hot Springs, steaming hot water flows over travertine terraces, creating a beautiful but otherworldly scene. Some people have even described Mammoth Hot Springs as a cave turned inside out. The Mammoth Hot Springs area is divided into two sections, the Upper and Lower Terraces.