The park's most distinguishing feature is a bronze Bullmastiff statue. The original plan for the park had a fountain in the center surrounded by the roses, but this was accidentally destroyed in transport to the site as it was being moved from its former home on Kelly drive.

Edward H. Schwartz, a dedicated Bullmastiff enthusiast, breeder, and exhibitor, donated the funds for a new focal point. Following a design competition, artist Victoria Davila—known for her sculptures of natural forms and animals—created the work. The resulting bronze figure is approximately 1.5 times the size of a real Bullmastiff.

Officially titled Gamekeeper's Night Dog, the sculpture received Fairmount Park Commission approval in June 1988 and was erected in 1989. The name is a nod to the breed's historical role: 19th-century British gamekeepers developed the Bullmastiff by crossing Mastiffs and Bulldogs to serve as silent, stealthy guardians. Their job was to track and hold poachers without causing injury until the gamekeeper arrived. This vigilant image perfectly anchors the park and inspired its popular nickname, "the Bulldog Park."