In a semi-related, semi-off-topic way, there was this challenge of going through all the subway stations of the Paris underground, during the same day (and if possible in the fastest way possible):<p><a href="http:&#x2F;&#x2F;www.madore.org&#x2F;~david&#x2F;misc&#x2F;defimetro.html" rel="nofollow">http:&#x2F;&#x2F;www.madore.org&#x2F;~david&#x2F;misc&#x2F;defimetro.html</a> [FR]<p>The funny part was that they wrote a program to calculate and optimize the time to do that, using the length of the lines and the little public info they had; and I thought it was pretty cool.
<a href="http:&#x2F;&#x2F;www.madore.org&#x2F;~david&#x2F;misc&#x2F;metro.tgz" rel="nofollow">http:&#x2F;&#x2F;www.madore.org&#x2F;~david&#x2F;misc&#x2F;metro.tgz</a><p>And of course, it was in 2002, so before the OpenData movements...