Etna, Minnesota Greenleafton. Nearby places in Iowa include Chester and Lime Springs. Etna is located 5 miles east of Ostrander; and 4 miles west of Cherry Grove. Forestville Mystery Cave State Park is also nearby. Etna, Minnesota Etna is an unincorporated community in Bloomfield Township, Fillmore County, Minnesota, United States. Etna is located within ZIP code 55975 based in Spring Valley. A post office previously operated in the community of Etna from 1856 to 1901. The community was named for Mount Etna, on Sicily. The community is located 8 miles southeast of Spring Valley, at the junction of Fillmore County 14 and
Etna Furnace (Williamsburg, Pennsylvania) the foundation of a tally house, a blacksmith shop (c. 1831), bank barn (c. 1831), foundation of a boarding house, three family tenant house, two iron master' mansions (one destroyed), a store and paymaster's office (c. 1831), Methodist / Episcopal Church (1860), and cemetery with graves dating between 1832 and 1859. It was added to the National Register of Historic Places in 1973, with a boundary increase in 1991. Etna Furnace (Williamsburg, Pennsylvania) Etna Furnace, also known as Mount Etna Furnace, Aetna Furnace, and Aetna Iron Works, is a historic iron furnace complex and national historic district located at Catharine