Millions of people travel to Persistence every year, and not because they want to see Half-Blood Falls.  Don’t get me wrong.  Two rivers, one dyed red by mineral deposits, meeting at a kilometer-high waterfall is a sight very few people will ever forget as long as they live.  But it’s the minerals in question that bring prospectors to Persistence, all of them hoping to stake out a claim filled with gold, silver, or other heavy metals.