After an extended stay in Sun Valley, we got back on the road. Destination: Arco. We took Highway 26, which is also known as the Peaks to Craters Scenic Byway. It couldn't be more perfectly named. The picturesque aspen-covered mountains of Sun Valley slowly give way to the bizarre lava-formed landscape of the Craters of the Moon National Monument. We were lucky to have stunning weather during the drive: a perfect showcase for Idaho's stunning natural diversity.