Every decent country needs some weird mystery in order to ooh and awe the young and attract feeble-minded tourists.
Thus in America we have Bigfoot, or a sasquatch, or the Shaq or whatever you wish to call it.
Nepal, then, has those abominable Yeti, Scotland has the world's most elusive lake serpent, and England and France are chock-full of cobwebbed old castles, deep in the cellar of any one of which might rest the Holy Grail. The big puzzle down under, meanwhile, is just who really does eat Vegemite.