The Mine Creek Civil War Battlefield is located south of Pleasanton (pop. 1,400). It was the site of one of the last significant battles west of the Mississippi River.
The Linn County Historical Museum in Pleasanton depicts the history of early Linn County through photographs, artifacts, documents and period-room settings.
St Philippine was a French nun of the Sacred Heart congregation, already in her early 70's and in poor health when she came to Kansas, but her love of God and the American Indian instilled in her the desire to serve. The St Philippine Duchesne Shrine and Park has a memorial recording the "Trail of Death", a massive altar and cross have been erected on the site of the original church as well as nature trails on the grounds.
The Trading Post Museum in Pleasanton is one of the oldest settlements in Kansas and the site of an early French trading post with the Osage Indians, established in 1825. Displays include historical exhibits, old farm machinery and an old country school.