After leaving Disneyland, Wood created Marco Engineering, Inc. to design theme parks. Many Disney employees joined him and he had access to the vendors and other talent available to him during the Disneyland days. He billed himself as "The Master Planner of Disneyland." A Disney lawsuit stopped him from using that title, but it did not seek financial damages. Wood's firm helped create Magic Mountain (now Heritage Square at Golden, Colorado during 1957, Pleasure Island (in Wakefield, Massachusetts, during 1959, Freedomland U.S.A.(on the current site of Co-op City and its adjacent shopping center in the Bronx, a borough of New York City), during 1960, and initial work on Six Flags Over Texas before Marco employee Randall Duell took over the project.