Central Idaho is in Idaho. Cities Arco Stanley Salmon Other destinations Custer Ghost Town Sun Valley -- the first great ski resort in the U.S. Craters of the Moon National Monument -- volcanic park with vast fields of seemingly lifeless lava, fun lava tubes to explore Sawtooth National Recreation Area Largest national recreation area in the United States Understand Get in Get around See Do Goldbug Hot Springs, near community of Warm Springs off of Hwy 93, 44.898°, -113.9573°, +1 208-756-5100. A popular hiking destination with a geothermal area nestled in the mountains at the end. Eat Drink Stay safe Go next