The Feld- und Grubenbahnmuseum Fortuna is a volunteer-run railway museum in Mittelhessen, Germany, operated by the nonprofit Förderverein Besucherbergwerk Fortuna e. V. Founded in 1983 following the closure of the Fortuna iron-ore mine, the museum preserves the history and technology of narrow-gauge field and mining railways.

Its collection includes more than 60 locomotives, with steam, diesel, compressed-air and electric examples, as well as historic railway cars. Visitors can experience regular steam train and mine train rides along a 2. 4-kilometre route through the Grundbachtal, with operating days offered between March and December.

The site also features railway workshops, a forge, a coaling facility and a turntable. Museum displays share technical and regional history, and educational resources and activities are available for school groups. The museum holds events and offers a museum guide for preorder.

Located within the Geowelt Fortuna complex, it is part of a wider visitor destination that also includes the Grube Fortuna visitor mine, a restaurant and a children’s playground