AKON is the picture postcard portal of the Österreichische Nationalbibliothek – Austrian National Library in Vienna. 75,000 postcards with topographical images from all over the world are digitized and available for viewing and downloading. The search can be carried out using the names of the places and a digital world map. Postcards are offered in color and black and white from all parts of the world, from the beginnings of the illustrated postcard at the end of the 19th century to the early 1940s. An excellent feature is the ability to create and call up a PDF similar to a photo album for all the places found. Try and test!