Have you heard about the Nazca Lines? There are several geoglyphs (a drawing in the ground) in southern Peru that date back a couple thousand years, best guess. They are really awesome and you should check out the pictures online.
I learned about them a few months ago when it was a slow night at the library and my coworker and I were looking up crop circles. The Nazca Lines are not crop circles but in our exploration I stumbled on these.
Flash forward to today when another coworker said "Have you ever heard of some lines in South America in animal shapes?" and I replied, "Yes, yes I have." I quickly did a Google search and voila! there was all the information for her. I'm sure she was impressed.
I will never again complain about being so bored at work that I'm "forced" to play on the internet. Because I just never know when that information will come in handy.