Since its creation in 2001, Wikipedia has grown enormously into one of the largest reference websites, with more than working on more than 35,000,000 articles in 290 languages.
Most of us generally use our favorite search engine or Wikipedia's in-built search functionality to find and read articles. A lesser known (or used) feature of Wikipedia is available on the left navigation menu beside any article known as random article (shown below).
The link uses a special address to retrieve a random article:
(bookmark it in your favorite browser before browsing the link)
With millions of articles in the repository, this is an addictive way of reading about random stuffs on Wikipedia.
However, if you are more interested in a filtered subset of articles, say, based on categories, Wikipedia has a special link for category wise randomized article too.
For eg. the following will give you a random article under Physics category:
For Computers related articles:
For the list of categories, check this link.
Be warned, this is an addictive tip, that could keep you engrossed for hours on Wikipedia :)