Yellowstone is a marvel of geothermal activity. The park is enormous (3,468.4 square miles (8,983 km)), and with two days of exploring, I still didn’t see anywhere nearly as much as I wanted to. Coming in from South Dakota, I ended up taking the East entrance, from Cody, Wyoming on a sunday afternoon. There were a number of gorgeous waterfalls cascading down the rocks on the side of the road throughout the ride in. It was fantastic. Lots o’ canyon, lots o’ waterfalls. Just how I like it….