Antelope Valley is a dry valley on the western tip of the Mojave Desert in California, located north of Los Angeles. Dyson Frost's wall was located in Building 7 of an abandoned Army depot at 423 Ingres Street, 46 miles northeast of Antelope Valley. ("The Garden of Forking Paths") Keiko Arahida was held in an immigration detention facility in the city of Lancaster, which is located in Antelope Valley. ("Countdown") The words "ANTELOPE VALLEY" appear at least twice, in green and in white, on Dyson Frost's wall. ("The Garden of Forking Paths")