Let's go watch some planes
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Easy cache near the Greater Cincinnati / N. Kentucky Airport. I was down here for a job interview and saw this spot and thought it would be nice for a cache. There's an interesting historical sign here that was totally unexpected (at least to me).
Update - the container is gone, but this area is still cool, so I have changed it to a virtual cache. Email me the year on the nearby US Historical sign for verification
(No hints available.)