If you ever wanted to see proof on why the web is such a wonderfully robust technology, this fully functional rebuild of the first ever WWW browser (aptly named WorldWideWeb) is where you should be looking at.
This is an impressive project, which I believe has a lot of potential in educational contexts as well. And besides, it is nothing short of mindblowing to browse today's web with a decades-old browser and see that it still works (for some websites better than for others, obviously, but sure for those that are built on robust web standards).
At the same time, this should be a reminder why good web design respects the resilient qualities of this medium - for universal and unlimited access to information.
Jeremy Keith provides some more background on the project, along with a list of credits.