I'm curious to see what topics the wikis cover, but I don't know how to find/locate them. I tried doing a tag search for "community-wiki" but it didn't show up anything.
Do you mean the tag wikis (which are different)?
"Community wiki" means a state of a post (question or answer) that makes it easier for other users to edit. To search for wiki posts use the
wiki:1 search modifier.
"Tag wikis" are special posts that are attached to particular tags. To access them, click on a tag (either under a question, in the sidebar, or in the "TAGS" tab) and then select the link in the little box at the top.