Plattsmouth anchors the northeast corner of Cass County and serves as its county seat. Its 6,500 residents live just south of where the Platte and Missouri rivers meet. The Lewis and Clark Expedition explored this scenic confluence on July 21, 1804. Today, modern-day explorers can splash along the banks or wade out to a sand bar near the confluence thanks to the Schilling Wildlife Management Area. This area also allows access for fishing and hunting along the banks of the two rivers.

Every September, corn is king at the Plattsmouth Harvest Festival along historic Main Street in Plattsmouth. There is a corn-eating contest, quilt show, carnival, photo contest, karaoke, food, music and more. The corn royalty coronation has been popular since 1935 when Harrison Gayer and Lois Troop Bester were crowned Corn King and Corn Queen.

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