Ogdensburg, NJ
The Sterling Hill Mine Tour & Museum offers a guided walk through a ¼‑mile section of the state’s oldest operating mine, allowing visitors to see historic mining equipment and processes. Participants observe drilling and blasting in action and pass through a tunnel that displays a wide range of fluorescent minerals, many of which can be collected for personal use. The site is notable for its extensive zinc ore deposit and for containing one of the world’s largest concentrations of fluorescent minerals, with over 350 varieties catalogued in the region.