Etna, California . Etna, California Etna is a city in the Scott Valley area of Siskiyou County, California, United States. The population was 737 at the 2010 census, down from 781 at the 2000 census. Originally named Rough and Ready, it was changed by statute in 1874 to Etna after the local flour mill (spelled Ætna/Aetna after Mount Ætna in Sicily). Etna is located at (41.457350, -122.896875). Etna is in Northern California near the Oregon border, located in Scott Valley near the CDP of Greenview, the city of Fort Jones, and the unincorporated community of Callahan. Etna is located at the foot
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