University of Hawai'i
University of Hawaii: Hawaii Center for Volcanology
This is the home page for the Hawaii Center for Volcanology. Look through this site and virtually visit the different volcanoes in Hawaii. Also provides a description of the formation of the Hawaiian Islands from volcanic activity.
PBS
Pbs Learning Media: Water Erosion
In this video from Nature, learn about the erosive action of water on the Hawaiian landscape and human efforts to limit it.