Pierson Park of Tarrytown offers walking paths, playground, picnic areas, and an open-air concert stage. It is also a part of the Hudson RiverWalk.
The cache will bring you close to a pier with great views of the Tappan Zee bridge, a distant NYC skyline, and the Palisades across the Hudson.
Do not step off the sidewalk to find the cache.
If it is busy and you still want to make the find, or you just don't want to be flustered, the hint is a dead giveaway.