"Valley of Dreams" is a science fiction short story by Stanley G. Weinbaum originally published in the November 1934 issue of Wonder Stories. Two weeks before the Ares is scheduled to leave Mars, Captain Harrison sends American chemist Dick Jarvis and French biologist "Frenchy" Leroy to retrieve the film Jarvis took before his auxiliary rocket crashed into the Thyle highlands the week before. Along the way, the Earthmen stop at the city of the cart creatures and the site of the pyramid building creature for Leroy to take some samples.