The Glenville Woods Park Preserve is a 45-acre sanctuary just off Rt.119 between Tarrytown and Elmsford, NY.
You will find a small playground, pond, and parking area if you go to the listed parking coordinates. Follow the blue blazed trail directly from this parking area and it will cross a bridge then wind it's way back into the preserve. Take a nice stroll in the woods. There are also other caches to be found back in them thar hills!