After several tries, we finally located the Imagine mosaic in the Strawberry Fields section of Central Park. I'm not sure how we missed it the first few times, but we finally got to the right path. It's across Central Park West and just slightly south of the Dakota building, where Lennon lived at the time of his death, and where Yoko Ono lives to this day. There was a guy there playing Lennon songs on a guitar, and plenty of people quietly showing their respects to their favorite Beatle. I don't know if you get the flower petals every day, or just on the weekends.
I was a little shocked to be a thousand miles from home and see a bumper sticker for a Tampa radio station on a guitar laid near the Imagine memorial. But there is was. Maybe I should send them this picture. WMNF, are you listening?