If you like old postcards....
The app Swiss Postcard unveils old postcards of over 1,000 Swiss municipalities of the early twentieth century in nearly all cantons. It was developed on behalf of the Swiss Conference of Cantonal libraries (CSBC).
Cantonal libraries and the Swiss National Library have thousands of postcards, indicates the CSBC in a statement Thursday. The Swiss Postcard application presents for the first time an excerpt from the rich collections that generally remain in the shadow of books and electronic media.
The app is available for smartphones and tablets running iOS and Android. It can be downloaded for free from the usual platforms. source
translated with google.
You can add to that the website http://www.communesgenevoises.ch/
who has 6000 old postcards from Geneva area.