Read about pu-erh tea. Learn about post-fermented tea: the tea that is better when aged. There are many zealots in the tea-drinking world who swear by their pu-erh cakes. Tell me, where do you buy yours? Consider me completely wet behind the ears in this area.
Photo courtesy of user Iateasquirrel on Wikipedia. Photo of a Xia Guan Tuo Cha.