Built in 1912, this structure was conceived as a combined refreshment stand and administrative center, then referred to as "The Casino." Because of its Spanish Mission Revival design, someone at the time of its creation felt that the building had the look of a Mexican "cantina" or Spanish casino; hence the name. 
The upper floor of The Casino once housed the park's administrative offices, and it was used for City Park Improvement Association meetings. In 1963 was renamed the Administration Building. 
Renovated again in 1999, one year later the casino was renamed the Timken Center. The center has played host to a number of concession stands ever since.