Buried Treasure!

Somewhere in the US, it would seem.  Excerpts:

...In 1988, Fenn was at the top of his career as an art dealer, with clients including Ralph Lauren, Robert Redford and Suzanne Somers, when he received devastating news: He had advanced kidney cancer. His diagnosis showed he had only a 20 percent chance of surviving the next three years.

So Fenn started to consider his legacy.

He worked on his clue-poem for years, and took his time collecting items to put in the chest. When he felt the treasure was complete and he was strong enough to carry it, he buried it.

"After I hid the treasure I walked back to my car feeling very proud of myself and laughing out loud," he said. "I asked, 'Forrest, did you really do that?' There have never been any regrets. Now it is for the ages and a big part of me in that treasure chest. I felt it go in as I closed the lid for the last time..."