If you're heading to Tucson by way of I-10, consider a stop at this state park, 35 miles northwest of Tucson at exit 219. Picacho Peak, a wizard's cap of rock rising 1,500 feet above the desert, is a visual landmark for miles around. Hiking trails lead around the lower slopes of the peak and up to the summit; these trails are especially popular in spring, when the wildflowers bloom (the park is known as one of the best places in Arizona to see spring wildflowers). In addition to its natural beauty, Picacho Peak was the site of the only Civil War battle to take place in the state. Each March, Civil War reenactments are staged here. Campsites in the park cost $25.