Oklahoma Historical Society

Monument at Twelfth Street in Sulphur, advertising "the playground of the southwest."

The 1910s and 20s were a first golden age for Platt National Park, as the park slowly evolved as a facility and visitors continued to come for the cool and 'health-giving' waters. The community of Sulphur also grew, and the park and town were in many respects inseparable during this time as Platt National Park became known as "the playground of the southwest."