Cultures all over the world have marked the passage of the seasons in many ways. In the Southwest, the solstices and equinoxes have often been tracked by watching the sun on the horizon, on particular landmarks, or on the faces of rock.
Visitors to Phantom Ranch and Bright Angel Campground at the bottom of the Grand Canyon probably noticed a flurry of activity this spring as a helicopter flew in a drilling rig and other large pieces of equipment.
Spruce Tree House is often the first cliff dwelling most visitors see when they arrive at Mesa Verde National Park in southwest Colorado. From the rim, people’s eyes begin to focus in on a sandstone alcove that shelters the superb architecture of the ancient dwelling.