national monuments California park warns hikers against building illegal trails due to "unexploded" grenade risk The area served as a military base for 65 years before being turned into a National Monument 6 can’t-miss National Park sites that aren’t parks We've rounded up nine of the best National Park sites that aren’t parks, with a focus on areas that are a haven for hikers What are National Monuments? What are National Monuments? Find out what they are, where to find them, and why they’re worth adding to your adventure bucket list Advnture NewsletterAll the latest inspiration, tips and guides to help you plan your next Advnture!Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1Overpass project to stop animals getting hit by cars in Yellowstone moves a step closer2This Altra Olympus 5 is one of the most popular shoes among Appalachian Trail hikers – get them up to 30% off right now3Struck down by altitude sickness, 2 hikers signal for help just before cell phone batteries die4World champions decided in tense Climbing World Cup final in Seoul5Jimmy Chin's "monumental and emotional" discovery of body on Everest may finally put mountaineering's most enduring mystery to rest
