The John Brown Museum State Historic Site consists of the cabin owned by the Reverend Samuel Adair and his wife, Florella Brown Adair, which was built in 1854. and is covered by a pergola that was constructed over the Adair cabin in 1928. The Adair cabin was John Brown's headquarters during his abolitionist crusade in Kansas Territory from 1855 to 1858. The museum features the original furniture owned by the Adair faimily and artifacts related to John Brown.