I had never seen anything like the geysers, hypo-thermal areas, mud pots and volcanoes, sulfur cauldrons and the Mammoth Hot Springs. The scale of the formations was immense. The colors of the different minerals made the formations look like works of art (nature’s art!) There are a few trails where you can walk nearby the formations, watch steam explode from openings and smell the wonderful sulfur. Hot Springs were flowing down this terrace, leaving behind deposits of minerals that would further build the terrace. You can see the beauty, but I couldn’t capture the smell!