Raft the Colorado River or Walk Grand Canyon Trails on Google Street View

Here's a cool new feature from Google Maps: Street View now includes the Grand Canyon. You can raft down the Colorado River or walk the, for example, Bright Angel trail via Google Maps' "street view" function. Try it and you'll find river scenes like these:

Or a trail view such as this one:

Cool. Start by going to google.com/maps and searching for the Grand Canyon.