her to San Francisco/Bay Area and hit Yosemite and Lake Tahoe while you are in the area. Maybe instead of Vegas (which I would probably skip, unless she really wants to go, or loves gambling).
If you do go to Disneyland, I’d hit the excellent Getty Museum in West LA (free admission, BTW) while you’re in Southern California, and some of the other LA highlights. The La Brea tar pits are one that our guests love. If you hit a beach with her, your friend might be surprised at how similar California beaches are to Chilean beaches.
I agree with the guy above who recommended Yellowstone and the Grand Canyon. I’d add Bryce Canyon, and maybe Zion if it isn’t super hot or the super crowded tourist season.