Charleston, PA, United States
Clay Furnace. First successful use of raw bituminous coal in place of charcoal, 1846; and of unmixed Lake Superior iron ore in 1856. Built 1845 by Vincent & Himrod; named for Henry Clay. Abandoned in 1861. The site is 2 miles away.
Listen to the audio guide for Blue plaque № 29245 Free on WIP — starts by itself when you arrive, even with the screen off