On a road trip to Flagstaff, Arizona, just after Needles, CA, when I crossed over the Colorado River, I stopped and took this picture:
A great view of the mountains of the Havasu National Wildlife Refuge, with the Colorado in the foreground. There appear to be no roads or any other access but canoe or foot. Makes me want to go hiking and climbing.
Here is the map, with the origin of the red arrow where I stood and took the picture, and the arrow showing the direction of the camera shot.