This one is Plymouth, Massachusetts...
...as is this one.
Montauk, Long Island, New York
Hamonasset Beach, Madison, Connecticut
This is a cool alternative viewer, also at Niagara Falls, that kinda reminded me of...
This one from Gloucester, Massachusetts is my all-time favorite.
You know you're at a truly awesome tourist location when they have one of those great old-time optical viewers from the Tower Optical Company. They've been making these binocular viewers since 1932 and the company is still going strong. I love how these machines have kept their sci-fi-of-the-past look they've had ever since I was a kid. Anyone got a quarter?