Grand Canyon at Grave Risk

Trodel, flickr

When Allison Mitkowski got married in 2005, she and her husband, Ethan, went to the Grand Canyon on their honeymoon, and they fell in love ... with the Grand Canyon. It lasted. They went back in 2007 to do a 22-mile North Rim-to-South Rim hike to celebrate a major birthday in the national park.

Finally, two years later, they decided to move to Arizona to be closer to the natural wonder. They still love the Grand Canyon. But they worry.