Abstract
In general, the Sacramento community does not possess an historical understanding of the city's underground spaces and hollow sidewalks. A tour program that invites local residents, tourists and school groups to venture underground and learn about the city's decision to raise the business district in the 1860s and 1870s will shed light on this important story in Sacramento history. The Interpretive Plan for the Old Sacramento Underground Tours is foundational in ensuring that accurate and engaging information about the history of the underground is presented to the public. The Plan is a training tool, and has the potential to inspire the preservation of the underground spaces and hollow sidewalks.