The American Southwest is honeycombed with ruins from long-past civilizations. Mesa Verde National Park and Canyon de Chelly National Monument are well-known for their cliff dwellings, while at Bandelier National Monument the sandstone walls are pocked with "cavates" used as shelter centuries ago.

A blind hiker who set off last month to go end-to-end on the Appalachian National Scenic Trail has had to reorganize his trek due to heavy snows and ice in the Smokies of North Carolina. Meanwhile, another visually impaired hiker is set on conquering the Pacific Crest Trail.

If you're planning a visit soon to Rocky Mountain National Park, you might want to read the following carefully and look at your calendar. Park crews plan to be spraying trees around the park through most of May in an ongoing battle against bark beetles.