(Image found on the MarshalN blog.)
Marshal N writes very knowledgeably about tea, particularly the wide variety of pu-erh teas he has collected. His style is very approachable, and it's quite fun to read his many, many reviews of the teas he loves (and hates!).
One in particular surprised me a little bit: Tea made from-- wait for it-- bug droppings. Yes, the droppings insects leave behind in a tea manufacturing plant, and are usually swept up and tossed out.
Oh, go read it. You know you want to. And then stick around and read the rest of his site.
(Eat your heart out, coffee drinkers.)