If you spend any amount of time perusing Wikipedia, you will encounter articles on topics that are either exceedingly trivial, offbeat, or hard to classify. For those who seek these articles, they have a page for it:
This could be considered a place to check for offbeat reference questions (although the Wikipedia search function should offer better results). Note that you would not want to assume that an article listed on this page would remain, as “all such lists have a risk of being deleted because of lack of neutral definition of what really is ‘unusual’.”
A few articles of note:
found via ResourceShelf
