Prettyboy CWMA
- State wildlife management area is located in northwestern Baltimore Counties, and owned by the City of Baltimore and is managed to protect the Reservoir. Regulations, special areas, user's guide and site management practices.
- http://www.dnr.state.md.us/publiclands/central/prettyboy.asp

Liberty Reservoir CWMA
- State wildlife management area is located on the border of Baltimore and Carroll Counties, and owned by the City of Baltimore and is managed to protect the Reservoir. Regulations, special areas, user's guide and site management practices.
- http://www.dnr.state.md.us/publiclands/central/liberty.asp

Baltimore Ecosystem Study
- Project aims to understand metropolitan Baltimore as an ecological system. Includes overview, meetings, news and events, personnel information, research, products and educational information.
- http://www.beslter.org/

Space Telescope Science Institute (STScI)
- Astronomical research center responsible for operating the Hubble Space Telescope as an international observatory. Site describes the center and provides news, photos and information about the HST and astronomical findings.
- http://www.stsci.edu/