Sometimes silver is hidden right in front of you. These minted U.S. coins were made with up to 90% silver, meaning the metal in the coins are worth far more than the coins face value.

This was one of our most exciting hunts of 2020. The wagon road was loaded with history, and every signal told a new story.

Back in the 1970s when silver prices were soaring, investors gravitated toward an unusual silver play—pre-1965 U.S. coins ...