United States

GORP's Top Parks
http://gorp.away.com/gorp/resource/us_national_park/main.htm

National Park service
http://www.nps.gov/findapark/index.htm

National Parks Magazine-"Explore the Parks"
http://www.npca.org/explore_the_parks/

National Parks Foundation  Discover the Parks
http://www.nationalparks.org/discover-parks/

AreaParks website
http://www.areaparks.com/

US-Parks
http://www.us-parks.com/


International

World Heritage sites
http://whc.unesco.org/en/list

About.com international parks page
http://usparks.about.com/cs/foreignparks/

I Love Parks International Parks
http://www.iloveparks.com/internationalnew.htm

National Parks