Humans of New York on Instagram: "Dear New York might be the largest public art installation in decades. All of Grand Central Station has been transformed into a celebration of the diversity and humanity of New York City. As part of Dear New York, there is a Steinway Concert Grand Piano in the center of the main concourse. During the day the piano is played by some of the world’s most talented pianists, selected by @juilliardschool . But after 10 pm something magical happens. The piano is made a