Park at the Hanover Town Library, aka the Etna Library, along Etna Road just north of Downtown Metropolitan Etna and walk up the obvious path. You will be in Hayes Farm Park heading to the King Bird Sanctuary and, if you continue to the west, the very interesting Trescott Wetlands.
If you go early to mid-June you will find many beautiful trees in bloom.
Looking back from the King Bird Sanctuary is this view.
Here is a mid-May 2019 bird walk in the King Bird Sanctuary lead by David Merker wearing the green vest.
From the King Bird Sanctuary, there is a trail down to and through the Trescott Wetland — a wonderful red maple – black ash swamp shown below.
Since this spot is close to home, I have taken many photo there over the years. Here are some of them.