My own list in California would include:
The Sequoias (especially the General Sherman Tree, probably the only living thing I’ve seen that would truly qualify as “awesome”)
Yosemite is beautiful, but it’s become so crowded with people it seems like Disneyland with trees.
The drive along highway 156 ( I think that’s the right number) between the central valley and Highway 101. The rolling hills and California live oaks there are almost as soul-feeding a view as the great redwoods.
The Antelope Valley when the popppies are in bloom
The Nappa Valley
California certainly is beautiful, but I wouldn’t say it is the MOST beautiful state. I doubt that there is a most beautiful state, given the different tastes already shown in this thread for California landmarks alone.
Almost any part of Utah, especially the massive landforms of Zion National Park, provides incomparable vistas.
Oregon has spectacular scenes from the great Columbia River Gorge to Crater Lake.
I once drove from California to Washington D.C and back, taking Interstate 40 going and I-80 on the return. Friends told me I would be bored, but I was inspired by great beauty all the way. (I have to admit, though, that Rock Springs, Wyoming was pretty drab.)
Nope, no MOST beautiful state.