For his research but more importantly his writings on the ethics of cryptography & the place of technology in society check out Phillip Rogaway's site, especially his sociopolitical essays.
Angels is one of my favourite very simple games. Conway's game of life is visited by an angel - can you spot her? Defocus your eyes and find the aberration in order.
I am a very big fan of fish of all varieties so I have been convinced by my wonderful friend Peter (see webring) to add a page telling you about my favourites.
I love Discworld, and Pratchett is even better with the Annotated Pratchett File as a companion. Check it out for extra comments/notes/explanations.
Ever wanted to know what you learn in Clown School? I did. This article collects hilarious stories from performers of clown on their journeys and what they learnt.
Find here a fascinating article from 1989 on meta-materials in F1 cars. It gives great insight into the design/engineering/crash-testing of cars at the time.
The National Parks Service (of the US) has crochet patterns written by rangers. I have made the Walleye and the Halibut (one of my favourite fish).
Currently working on finding a better source, but for now just check out the Wikipedia page for WWII Code Talkers. The Code Book by Simon Singh is a great source for more information if you can get your hands on it!
I'm super not a fan of the concept of going in caves myself, but luckily Carla Kirby is because she's created this wonderful site filled with her own original images and thoughts of all things caves. Cool stuff!
Browsing houses for sale is a well-known guilty pleasure, but if I may, browsing houseboats is arguably even better. All the charm of getting pissed off by comically expensive and ugly housing, with the addition of perplexingly arranged rooms, oddly-placed showers, and the joys of much more creatively-written descriptions. Also discoverable in the wild wild west of boattrader.com -- entire cruiseships for sale, genuine shipwrecks, and the highs of 1950s pleasurecrafts (boat impeccably designed to look like a floating car anyone!?).
For some reason, there's an immense joy to comparing things that should be ostensibly the same around the globe. I recently found a page of international Papa John's stores, and it's kind of wonderful to see how the sites themselves & offerings diverge as you travel around the globe. Some of the creations are sort of horrifying to me, and that's coming from someone raised on Brasilian pizza....