Exploration: Mines
- Historic Iron Mines
- History and photos of the miners, mines, forges and furnaces of New York and New Jersey. Gives a nice overview of the industry as well as documentation of some of the better-known sites.
- http://www.historicironmines.com/
- Exploration. Mines. New Jersey. New York. Regional History.
- IronMiners.com: Mining History in the Highlands
- History, photos and explorations of the iron mines of the New York and New Jersey highlands.
- http://ironminers.com/
- Exploration. Mines. New Jersey. New York. Regional History.
- Nepaview: Old Railroads of Northeastern Pennsylvania
- The site's author has walked extensive sections of the Erie, O&W, CNJ, and D&H railroad right-of-ways in Northeastern PA and has documented his discoveries with photos. An excellent, detailed view of the current state of these abandonments.
- http://www.nepaview.piczo.com/
- Abandonments. Exploration. Maps. Mines. Pennsylvania. Railroads. Regional History. Trails.
- The Underground Miners Website
- The official page for coal mine research and exploration in Northeastern Pennsylvania
- http://undergroundminers.com/
- Exploration. Mines. Pennsylvania. Regional History.