Marine Resources and Coastal Zone of the ACG
- Describes the biological interests of the islands and bays of the far northern coastal area.
- http://www.acguanacaste.ac.cr/1997/ecodesarrollo/investigacion/recursos_marinosing.html

Protected Areas Programme
- World Heritage Sites history and physical features of the National Parks in Guanacaste. Includes info about location, attractions, and visitor facilities.
- http://www.unep-wcmc.org/sites/wh/guanacas.html