Informal education in museums is structured through movement in space. This article summarizes a range of research that examines the role of spatial layout in shaping the ways in which visitors explore, engage, and understand museums and museum exhibitions. It is demonstrated that behavior patterns are systematically linked to spatial characteristics of access and visibility. Furthermore, it is suggested that these patterns of access and visibility construct a spatial discourse that flows in its own right, although not entirely separate from the curatorial message. (Contains 2 tables and 3 figures.)