A young girl leans on a tree and looks beyond a waterway at an unknown building. Is the building she looks at her own palace of dreams? What could it be?  Purchased for this archive from the photographers grandson Thomas High, a bit more information is gleaned:

The girl in the Palace of Dreams is Ethel. (Ethel Lorene Blumann 1902-1990) As we discussed, we’re not sure where this was taken, but it appears quite likely that it was at the 1915 Panama Pacific International Exposition in San Francisco.  Sig was a member of the orchestra at the Union Pacific Railroad’s “Old Faithful Inn” at the Fair.  At the same time, he wrote a series of articles on the fair for the Photographic Journal of America, illustrating them with his photographs.

The various buildings on the grounds of the Exposition were often referred to as palaces, but this very well documented fair reveals no easy clues when put through online image searches.  One other possibility may be a general view looking across Oakland’s Lake Merritt should this actually be a California image.