Across the National Park System, maintenance needs are creating safety issues for park visitors. Whether it's the leaking Trans-Canyon Pipeline at Grand Canyon National Park, eroding walls at San Francisco Maritime National Historical Park, or cracks in the Blue Ridge Parkway, tens of millions of dollars in deferred maintenance are dangerous for visitors.

It's summer, you're in a national park, what's to worry about? Well, quite a lot, actually, if you're not careful. At Grand Canyon National Park in Arizona, staff are hoping visitors have a great time, but asking that they take a few precautions to ensure they have a wonderful vacation. They do that in the wake of a visitor who fell 500 feet to their death on Tuesday.

A colorful rift in the earth millions of years -- and immeasurable gallons of water -- in the making, the jagged maw of the Grand Canyon draws crowds content enough to simply stare across this impressive cross-section of geology from either the South or North rim of its namesake national park.

If you're planning to visit Grand Canyon National Park in mid-June, spend a little time looking up, not just down into the canyon.