Inspired by the recent news item about the Swiss farmer discovering a hoard of 4,000+ Roman coins, it seems reasonable that frontier residents of a fantasy world beset by invading Orcs, dragons, etc. would also resort to burying their wealth.
This presents an opportunity to clever adventurers — why go dungeon delving if you need only dig up treasure from the ground? Of course the trick is finding the coin hoards.
Is there a D&D 3.5e or Pathfinder spell or magical item that allows characters to detect the location of concentrations of treasure across long distances (let's say at least 10 miles from the spellcaster/user)?
The best I could find with Google is Treasure Scent, which is only effective out to 30 feet. Wish is another possibility, but the rules as written don't explicitly allow treasure detection with the Wish spell.