The first cam on the Internet! Is the coffee pot at the University of Cambridge's Computer Laboratory half full or half empty? That depends on whether you're an optimist or a pessimist.
Paint Web Cam
The image updates every 60 seconds, but you'll probably have to watch it for a couple of years before you notice any changes.
Mold Cam I:
Night of the Living Strawberries
Eeeew. Someone at Silicon Graphics left a glass bowl full of strawberries in the refrigerator in August 1996, and a Web cam followed their gradual disintegration (which you can check out) over a period of two months. A new experiment in mold is in the design stages.