SiteNavigation is the central place to explore this wiki. MoinMoin supports these IndexingSchemes:
At the bottom of each page, there are actions that allow to navigate to other pages related to the current page:
LikePages
LocalSiteMap
Additionally, there are the [[PageList]], [[FullSearch('text')]] and [[TableOfContents]] macros, which allow you to automatically generate indices for cohesive parts of a wiki.