There is a very cool toolbar you can download called Stumble Upon. Once you install it, you tell it what sorts of things you're interested in and then you can hit the "Stumble" button and be taken to a random site that fits your preferences. So far, every site that I've "stumbled" to has been pretty cool. (That's how I found the picture shown below) You can tell the toolbar whether you like what they recommended or not, thus refining your preferences for future "stumbles". The site is one of several companies owned by eBay. Here's a link:

http://www.stumbleupon.com/