The Downtown Three Rivers Commercial Historic District has one of the best-preserved Victorian streetscapes in southwestern Michigan. Three Rivers, settled in the 1830s, grew with the development of local water power and a railroad in the 1850s. St. Joseph Street (North Main) and Penn Street (Portage) formed its business center. The district's oldest structures, built on North Main in the early 1850s, are the Kelsey building (39-43) and the Crossett-Spencer-Millard building (40-42). The district was listed in the National Register of Historic Places in 1982.