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 Township Mounds that the mounds are the work of a group of individuals isolated from the rest of their culture. Because excavation of the mounds is likely to yield valuable information about such isolated groups, the mounds are a potential archaeological site. In recognition of their archaeological value, the Etna Township Mounds were listed on the National Register of Historic Places in 1975. Etna Township Mounds The Etna Township Mounds are a pair of Native American mounds in Etna Township, Licking County, Ohio, United States. Located east of Reynoldsburg near Interstate 70, the mounds are built primarily of sand. Unlike typical Native