Here's a treasure that I think is interesting. Kind of supernatural. In 1880 there were 3 men that were escaping a blizzard and hunkered down in a canyon. They looked across the canyon and saw some caverns and went into them and found some skeletons, gold bars and other treasures in the cave. They take 5 gold bars out and go to the town of Silver Cliff and had the bars assayed at a value of roughly $900. The next spring they returned to the location that they thought the cave was in and they could not find it. They looked for the caves for years after and could never find it.
To me it's like the cosmos gave them their chance at wealth and they didn't fully take it so it got covered up. Who knows. Maybe someone will find it.