talWhat's not to love about solargraphs—multi-week or month exposure images made by pointing pinhole cameras at the sky and recording the trails left by sun. I've always thought of solargraphs as portraits of time itself.

A Finnish student named Tarja Trygg sends pinhole cameras to "assistants" around the world. They record images and mail the cameras back for processing. Trygg has set up a solargraphy website to showcase the results. Some examples (from Alexandria, Egypt and Tijeras New Mexico respectively):

More solargraphy links: Becky Ramotowski's Castle Rock , flickr sologoraphs , Justin Quinnell's widely blogged solargraphs , Michael Wesely