Supportive community contexts are critical to positive youth development. Out-of-school time (OST) programs serve as supportive community contexts, and participation in OST programs is associated with a host of positive outcomes for youth. Cultural centers, such as museums, have been identified as potentially supportive community contexts for youth. Still, museums have been mostly absent in the broader research discussion of the role of community-based OST programs in promoting positive youth development. The current article presents a qualitative, single-case study of 37 youth between the ages of 13 and 18, the majority of whom identified with racial/ethnic identity groups traditionally underrepresented in OST program participation, in which we examined youths' perspectives of the features of a museum-based, science-focused, youth development program that they found to be particularly supportive. Five themes emerged, including (a) the program structure, (b) meaningful opportunities and experiences offered by the program, (c) relationships with staff, (d) a positive peer culture, and (e) sense of belonging. The results provide detailed insight into how cultural centers, such as museums, can serve as supportive community contexts for youth development.