19 stunning photos that show just how amazing US National Parks are

The United States is home to some of the most incredible natural sights and wonders in the world - from towering mountains to otherworldly rock formations - and we're grateful the National Park Service honors and preserves many of these unique sights.

The agency proudly fosters outdoor exploration for over 300 million guests each year, but if you haven't been fortunate enough to visit the powerful geysers of Yellowstone or the labyrinthine tunnels of Mammoth Caves in person, then fear not.

We've rounded up some of the most awe-inspiring and unique features of national parks across the country for your appreciation.