In reply to Longsufferingropeholder:
> Is it just me or is there some mix up here between naming the levels and naming the routes?
yes in some cases, for example the Slug club special route which is not a level. But I think he has a case when talking about the levels in Australia such as Skyline and looning the tube which all had names already.
> In my mind the levels are Serengeti, Dali's hole, California etc. What's the story behind those names?
You can watch the following program on iPlayer (with subtitles) which had an explanation for a lot of the old names and at one point showed a map with all the names of levels throughout the quarry:
https://www.bbc.co.uk/iplayer/episode/p0hyxff8/cynefin-cyfres-6-llanberis