Photoshop postcard using double exposure.
I used 2 original stock images from Shutterstock :
https://www.shutterstock.com/fr/image-photo/beautiful-redhead-woman-freckles-studio-profile-789036601 (thanks to ABO Photography)
https://www.shutterstock.com/fr/image-photo/alpamayo-peak-cordilleras-mountain-3754195 (thanks to Galyna Andrushko)