User blog comment:Spawny0908/UPDATE!!!!: The Free DLC pack is coming in...../@comment-107.5.143.219-20110808034915/@comment-3455248-20110809055203

hunting ground (lowercase = informal, no XP) vs. Hunting Ground (uppercase = formal, XP). During the Master Hunter challenge it acts a lot like a Hunting Ground, but that's a once per Legend thing whereas Hunting Grounds can be done repeatedly at will.