Clue 5

In a park
Is where I’ll be found
But there is so many
Choices around

So, where I am hidden
I have to say
It’s a lot quieter now
Than it was back in the day

It is quiet and serene
Many days a week
So, stroll on through
To find what you seek

Take a history tour
And look really close
For I will be sitting
Right under your nose

Do you know what was happening in Chaska on June 23, 1960?