The Marshall Steam Museum features the world's largest collection of operating Stanley steam cars plus a 1914 Ford Model T, a 1916 electric car, two 1930s Packards, the 1/8-scale Auburn Valley Railroad, an operating Lionel model trains display and so much more. Nestled in the small town of Yorklyn, Delaware, within Auburn Valley State Park, the museum is operated by the Friends of Auburn Heights, Inc a 501(c)3 non-profit. The museum is open Thursdays and Fridays from 1 to 4 pm (except major holidays, including Good Friday), hosts Steamin' Day events from June - November and provides educational outreach programs.