Saguaro National Park protects the nation's largest cacti and the iconic symbol of the American West. Split into two districts flanking Tucson, Arizona, the park preserves pristine Sonoran Desert landscapes where towering saguaro cacti create cathedral-like forests against dramatic mountain backdrops. These ancient giants can live over 200 years, grow to 40 feet tall, and don't produce their first arms until they're 75-100 years old. The park's two districts offer different experiences: Saguaro East (Rincon Mountain District) features wilderness hiking and cooler mountain forests, while Saguaro West (Tucson Mountain District) offers easier desert walks and spectacular sunset views. Beyond the famous saguaros, the park protects over 1,100 plant species and diverse wildlife including javelinas, coyotes, and over 200 bird species. The desert comes alive with wildflower blooms in spring and offers some of the darkest night skies near a major city, making it perfect for stargazing.