Those intrepid Googlers have been taking their cameras on more adventures: now you can take a run down the Colorado River Rapids on StreetView.
Only mapped in 1869 and now America's most endangered river, the Colorado has flowed through the western desert for 6 million years—in turn, forming the Grand Canyon. As well as running the rapids, you can saunter through sleepy river beds and explore rarely seen side canyons. Go explore! [Google]