The last picture he took was a rather somber look at New York, from the top of the Empire State Building. A few quick editing actions to remove the filter showed that, in reality, there was a break in the cloud cover and the sun was peeking through. It was his mood that was blue.
In the lower left corner is the iconic Flatiron Building, the new One World Trade Center is in the middle, and the Statue of Liberty is visible in the distance to the right. He loved architecture and design would want you to see them. He was quick to point out important sites like these: