Bern, ID

ZIP code 83220 covers the town of Arco, Idaho, nestled in the scenic Lost River Valley. Known as the "First City in Idaho," Arco is home to the Experimental Breeder Reactor I nuclear reactor, a National Historic Landmark. Other notable landmarks include the Craters of the Moon National Monument and Preserve, which showcases a unique volcanic landscape, and the Idaho Science Center, offering interactive exhibits for visitors of all ages.