Googling for "widow's walk"......
Wiki
Ah, I see. Negative on that.
The Wiki is wrong at least for Long Island where I grew up.
The houses on the water that had these were primarily in the harbors such as Sag Harbor and Three Mile Harbor. They were called Pirate lookouts because when the pirates were home there was always a Lookout posted up there in case authorities started to close in whether my sea or land.
The houses also had secret walls, entrances and escape tunnels.
It was so cool exploring these houses.
I remember one that had a secret entrance way to the escape tunnel that was next to the fireplace. It then has stairs that snaked around and around the chimney until got to door that led to the tunnel outside. The tunnel then came out just under the dock.