Butterflies of Adams County
- Offers detailed information about butterfiles commonly found in the area.
- http://www.butterfliesandmoths.org/map?dc=294&_dcc=1&si=39

Summary Groundwater Resources of Adams County
- Technical report covers the county's geology, hydrologic system, and factors that influence the yields of wells. Includes maps.
- http://www.dcnr.state.pa.us/topogeo/pub/water/w052.aspx

The Master Gardener
- Community volunteers, trained by county extension agricultural agents, who work with local organizations, schools and service clubs, and provide speakers on a wide variety of gardening topics.
- http://www.emmitsburg.net/gardens/

Geology of Adams County
- Brief description of geological features including a detailed map.
- http://www.libraries.psu.edu/emsl/guides/X/adams.htm