The Albany Times Union reported that Dutch Schultz, whose real name was Arthur Flegenheimer, was a well-known bootlegger and racketeer in the Hudson Valley and Catskills area.
After Schultz was shot in Newark, New Jersey in 1935, he said odd phrases on his deathbed that many believed were coded references to the town of Phoenicia in the Catskills, the Times Union said.
Schultz is believed to have hidden a combination of paper money, gold coins, bonds and jewelry that is estimated to be worth between $50 million and $100 million.
The legend has inspired many treasure hunters to travel to Phoenicia and search for it.
The treasure is also rumored to be buried in Lake George and Yonkers, a Sullivan County historian told the news outlet.
However, he said it's possible the treasure may have already been found, or it may never have existed.
Click here to follow Daily Voice Fairfield and receive free news updates.