AllTrails on Instagram: "You think the @nationalparkservice is just about national parks? Think bigger ️⛰️️ From monuments to seashores, forests, and historic sites, they protect over 400 natural and cultural gems across the US ✨ Celebrate the National Park Service's birthday by finding your new favorite spot to explore — whether it’s a quiet trail, a historic landmark, or a stretch of rugged coastline. Where will your next adventure take you? Share with us below!"