The Main Atrium ID: 3594 | This file appears in: Trailside Interpretation Center A view of the main atrium of the Rocky River Nature Center from outside. The Rocky River Nature Center was built in 1971 in response to the tremendous number of visitors that the three trailside museums could no longer accommodate. | Source: Cleveland Memory Project, Cleveland State University Library Special Collections Download Original File SourceCleveland Memory Project, Cleveland State University Library Special Collections "The Main Atrium" appears in: Trailside Interpretation Center