One thing I love is old science-fiction. I find it fascinating looking back at how people in the past imagined the future would look, and how it actually turned out. I ran across a series of 16 pictures drawn by a french artist (feuilleter?) in 1910, showing his concepts of life in the year 2000. (You can click on the pictures to see a larger version) He hit a lot of things really accurately that probably weren't too much of a stretch - electric trains, motorcycles, "automobiles of war" - but I'm impressed by the "Correspondance Cinema", and that one "At the School" where the teacher is dropping books into a mechanical machine that appears to put the information straight into the kids' heads. I'm also intrigued by the one titled "Un Diner chimique" - "A chemical dinner" where there's no actual food, just little flasks & things. The last one appears to portray what looks like horse-drawn carriages, if you removed the horses and stuck wings on them.
All in all, I think he got it pretty spot-on, conceptualizing the technologies that really ended up defining our lives on this end of the century - cars, airplanes, automated manufacturing, processed foods, computers. 2010 is going to be coming up soon - what are your predictions for the year 3000?