In the 1930s, the Works Progress Administration (WPA) made a major project of the restoration of Fort Negley. However, almost simultaneous with the completion of this project came the United States' entry into World War II. Neither the manpower, funds, or the interest was available at the time to reopen the fort as an historic or interpretative center. After the war, the fort was allowed to continue to languish, becoming the site of vandalism and minor crime; entry to the site was finally prohibited and the area reverted to forest. However, the surrounding grounds became the site of a municipal park, first as the site of baseball and softball fields for youth and adult leagues, and later as the site of Herschel Greer Stadium, a Minor League Baseball ballpark. The Cumberland Science Museum, a continuation under a new name and in a new venue of the former Nashville Children's Museum (now the Adventure Science Center), was built on the northwestern slope. Most visitors to the stadium and the museum were generally unaware of what was on the wooded hilltop other than it was something which they were not allowed to access.