Set just north of Flagstaff, Sunset Crater Volcano National Monument is a popular day-trip destination that is often paired with the neighboring Wupatki National Monument. You can visit on your own or on a group tour that also visits other Northern Arizona attractions such as the Grand Canyon and Navajo Nation.
In addition to learning about the volcanic eruptions from informational plaques, you can also enjoy hikes throughout the park. While the Sunset Crater itself can not be climbed (the trail to the top was closed to prevent erosion), you can explore the formations at the foot of the volcano on the Lava Flow Trail. If climbing a crater is your goal, head to the park’s Lenox Crater—a steep trail leads to the top.