Nature Done Wright

In honor of the fall raptor migration, I'm posting a series of five photos of a hawk watch in New Jersey, New York or Pennsylvania, and see who can name the hawk watch. This is the second of five.

Where is this postcard from? What is perhaps the most significant fact about it?

Hint 1: It's from a hawk watch near here, in the old days.

Hint 2: See below, a 2022 photo during an August lull.

This is the second of five Monday hawk watch mysteries.

The first one is here:

https://www.celeryfarm.net/2023/09/monday-hawk-watch-mystery-090423.html