I had the need to do a bit of mind mapping the other day and was reminded of a cool visual search engine called KartOO.
Rather than a boring list of result like you get from Google, it supplies a pretty picture with most relevant links in the middle and similar subject scattered about. Words that link the results also appear and hovering over them shows which links relate to which words. Clicking a word adds it to the search
Go on, have a go, with something like
mark beaumont cycle
and see what it draws.