Usually I search particular things on Wikipedia – information about episodes of a television series, the career path of famous people, etymology of words. I find what I am looking for and leave.
Somehow I stumbled onto a Wikipedia page about common misconceptions, and I actually read through the entire thing as though it were a magazine article.
Some of them I knew but there were quite a few I had heard but did not know they were not true.
These are some of the examples on the page: