The standout feature is the Smoky Valley Roller Mill (NRHP), a grand three-story brick structure with polished wood chutes, belts, levers, wheels, augers, sifters, and bins—the only things missing are the noise and grain dust flying. Built in 1898, it is the best-restored mill in the state and rests on its original site along the Smoky Hill River. Within the museum complex the Swedish Pavilion (NRHP), prefabricated in Sweden as a Swedish exhibit building for the 1904 St. Louis World's Fair, serves as the anchor for a collection of early settlement buildings. Museum exhibits relate the county history including the impact of the Swedish and Mennonite immigrants on local culture.