From the Tate Modern

 Salvador Dali's Forgotten Horizon (1936, oil on wood)

"Dali's disturbing, imaginary landscapes often contain references to his own life.  Forgotten Horizon is a typical example, drawing upon memories of childhood holidays on the beach at Rosas on the Costa Brava.  The striding woman in the distance is his cousin, Carolinetta, while the dancing figures in the foreground were inspired by a picture on a postcard.  Dali intended the effect to be hallucinatory, with the figures appearing as if project onto a prepared background or theatrical set."  

-Tate Modern Museum description placard