I love Fortean Times's online gallery of strange photos and illustrations. Along with antique spirit snapshots, stigmata statues, Bigfoot, and dervishes, they have a nice selection of "simulacra photos." In Fortean terms, simulacra photos depict "spontaneous or natural figures or images. These can occur in nature as well as in the chance conjunction of artefacts." For example, the seed capsules of snapdragons in this photo. Readers are invited to send in their own shots to the print magazine's Simulacra Corner. Link
David Pescovitz is Boing Boing's co-editor/managing partner. He's also a research director at Institute for the Future. On Instagram, he's @pesco.