A couple of weeks ago I went to the unveiling of the official state historical marker commemorating Lock Ridge Iron Furnace in Alburtis. Lock Ridge Furnace was the last furnace in the U.S. to solely use anthracite coal as fuel.
The remnants of the 1868 Lock Ridge Iron Furnace, which look a bit like the ruins of a castle, are actually located in a beautiful park. At this time of year with the leaves changing, it is a great opportunity to see some history and enjoy fall foliage at the same time. You can also visit some of the merchants in the business district of Alburtis while you are there.
The Pennsylvania Historical and Museum Commission administers the historical marker program throughout the state. The Lock Ridge Iron Furnace/Alburtis marker is the 31st site in Lehigh County; there are 69 sites in Northampton County. That's a total of 100 sites in Lehigh Valley. How many have you seen?