For geology buffs or just people interested in unique, natural attractions, Thermopolis is a treasure trove! A perfect example located within Hot Springs State Park is the Rainbow Terraces. These beautifully colored and naturally-formed mineral deposits from the hot springs came together to create a lake reaching 125 degrees! For thousands of years, minerals from the hot springs have been deposited at the Rainbow Terraces and the unique beauty of this process is on technicolor display to all Hot Springs State Park visitors. Just follow the walking path and you’ll arrive at the splendor!