Exploration: Maps
- Dunderberg Spiral Railway
- Follow the trail of a pleasure railroad partially constructed in 1890-1891 on a mountain near Jones Point, New York.
- http://www.columbia.edu/~brennan/dunderberg/
- Exploration. Maps. New York. Railroads. Trails.
- Historical Maps of Pennsylvania
- Maps of Pennsylvania from the 16th century to the present.
- http://www.mapsofpa.com/
- Exploration. Maps. Pennsylvania. Regional History.
- Microsoft Maps
- Cool Microsoft mapping site. Has some actual color overhead pictures of landmarks.
- http://local.live.com/
- Exploration. Maps. 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.
- Ulster & Delaware Railroad Historical Society
- Details railroad history in New York's Catskill and Hudson Valley regions.
- http://www.udrrhs.org/
- Abandonments. Exploration. Maps. New York. Railroads. Regional History.