Another "Spanish Mission Revival" Union Station to go with the one Dan posted. This style of architecture was popular along the coast of California as interest in the mission chain was renewed in the early 1900's. Touring the Missions along the El Camino Real (later Highway 101) was a popular excursion for early motorists.
The most well known example of the Spanish style architecture applied to a service station is the Barnsdall Rio Grande station just north of Goleta, California. This little station building took the style to the extreme.