We took a day hike into the Pine Barrens in South Jersey. We found a lot of what we expected…sand, streams and wildlife. But then we found this old tower. It appears to have an oven of sorts in it that had been modified over time. Below is an explanation from Wikipedia.
During colonial times, the Pine Barrens was home to various industries. Bog iron was mined from bogs, streams, and waterways, and was worked in furnaces at Batsto, Lake Atsion, Ferrago, Hanover, and several other locations. Iron from these early furnaces was instrumental in supplying the American military with weapons and camp tools during the American Revolution and the War of 1812 and the Second Barbary War. The bog iron industry fell off in the mid-19th century when iron ore could be mined more cheaply in Pennsylvania. Other industries such as paper mills, sawmills, and gristmills rose and fell throughout the years. Smaller industries such as charcoal-making and glass making also were attempted and met with varying degrees of success.