This interesting sculpture is called Blossom and it was created by the artist Sanford Biggers in 1970. Blossom is on exhibit (apparently on its own as opposed to being part of a particular show) at the Brooklyn Museum.
One evening earlier this year, Geoffrey and I were walking home from an art opening at Jonathan LeVine Gallery and I snapped a photo of this cool tree on 23rd Street just East of 10th Avenue. The lights are not really heart shaped, but it looks like they are. I like it.