You won't find it in any site navigation, searching yields almost nothing, and the team at GenerationMP3 admit that they stumbled on it by chance (you can still find it via cachedGoogle pages, which indicate that it was on the U.K. site's navigation at some point in recent history).
It contains a short summary of the page and a link to a snapshot of the page, called a cached version, that Google saved when it first indexed the site.