Camp Green Lake was built somewhere near an abandoned town. The town used to be by the largest lake in the state, but became a dry lake-bed after Sam the Onion Man was killed on the lake 110 years earlier. The Camp is run by Warden Walker, and her assistant Mr. Sir, and camp counsellor Dr. Pendanski. Each day, the detainees must dig a five-foot round hole in the desert to "build character". However, after Stanley, the great-great-grandson of Elya, carried Zero, a descendant of Madame Zeroni up to the mountaintop, he unknowingly broke the curse that had haunted the Yelnats for generations by singing the lullaby to Zero.
- It never rains at Camp Green Lake, it hasn't for one hundred years.