Times change, and there's no greater reminder than the remnants of industries that once were. Some were rendered obsolete by new technology and others simply couldn't keep up in economic downturns. Often outdated factories get demolished or replaced, but in some cities and towns the husks of old factories remain as eerie reminders of heydays that couldn't last — which makes sense, considering we have whole communities that continue on as ghost towns long after their people have left, and even popular tourist destinations abandoned by their makers. Here are 16 abandoned factories you can still see in the U.S. — and what they were like in their heyday. Looking for more eerie destinations, check out 17 Abandoned Theme Parks to Explore for Thrills, Chills, and Nostalgia.