Postcard Atlas lets you create unique, procedurally generated postcards of real places around the world. Choose a city, a season, and a time of day — then add a personal note and send it to someone you care about.

Each postcard is generated from real astronomical data. The position of the sun and moon, the season, cloud cover, and quality of light are all computed for your chosen place and moment. The result is a one-of-a-kind scene you can personalize with your own message.

Head to Create to design your postcard. Pick from several selected places — or define your own — then add a note, choose a font, and download the finished card as a PNG ready to share.