Inspiration Point, Yosemite
If you enter Yosemite on Highway 41, you come to this Inspiration Point (often also called tunnel view, but I think that name is far less glamorous and meaningful).
From there you can see the entire valley stretched out in front of you, El Capitan, Bridalveil Fall and Half Dome, and more trees then you could ever count in a life time.
The story is that this is where the first non-native Americans 'discovered' the valley. No doubt it left them as breathless as it did me.