Rat Rock is an outcrop of Manhattan schist which protrudes from the Central Park bedrock in Manhattan. It is named after the rats that used to swarm there at night but it is also known as Umpire Rock. It is near the southwest corner of the park, south of the Heckscher Ballfields on the lines of 62nd Street and of 7th Avenue. This rock is famous amongst boulderers.
The original equirectangular image is here.