Another 15 years would pass before the third treasure box was found. Jason Krupat is a puzzle and game designer by trade, so The Secret was right up his street. Krupat and his family had long suspected that one of the fabled boxes was hidden in Boston's Langone Park. More specifically, they were convinced it was buried under the home plate of the softball field.

While jogging in Langone Park in 2019, Krupat was horrified to see construction workers digging up the area. Worried the treasure would be lost forever, he worked up the courage to tell the site foreman about his wild theory. At first they thought Krupat was crazy, but months later a construction worker found plexiglass and ceramic linked to The Secret by the home plate.

Krupat rushed to the site and uncovered the all-important key (pictured). Although Byron Preiss had died in 2005, Krupat and his family were still able to claim the reward. And the location of the remaining nine boxes? That’s a secret Preiss seemingly took to his grave…

Incredible treasures found in ordinary public parks