Elm Research Institute
- Non-profit group promotes planting of the disease resistant American Liberty elm. Lists tree history, planting tips, FAQs, ordering information, membership form, and the Johnny Elmseed program.
- http://www.landscapeelms.com/

Otter Brook Lake
- Recreation area and flood control dam maintained by the Army Corps of Engineers. Lists fees, contacts, event schedule, flood control information, map, and natural resources.
- http://www.nae.usace.army.mil/recreati/obl/oblhome.htm