Not sure which parks to hit on your interstate road trip? National Geographic: Guide to State Parks provides a curated selection of the best – all nominated by the park directors of our 50 fine states. Explore over 200 parks across the nation by poring through 200+ color photographs, 32 useful maps and detailed descriptions. You'll find highlights on each park's top activities – like hiking, biking and birdwatching – plus the nitty-gritty on addresses, websites and camping.