You are looking for a bison tube hidden in something else, at Peach Hill Park in the Town of Poughkeepsie.
I've spent a lot of time birding here at Peach Hill this spring. One of the birds I saw was a wood thrush. It is a medium brown bird with speckles, whose song is a flute-like 'ee-o-lay'. This cache is located on the white trail, a great spot to see migrating warblers in May. The cache is two steps off the trail.