U.S. Geological Survey, Volcano Hazards Program - Monitors volcanoes and collects scientific information on volcanoes in the United States and elsewhere to reduce the risk from volcanic activity. Virtually Hawaii - Hawaii satellite images, Virtual field trips and flights past the volcanoes. Volcano Live - Provides information about volcanoes, eruption, and volcano treks, and links to other volcano educational sites. Includes links to volcano-cams. Volcanoes in New Zealand - New Zealand is volcano country with recent eruptions at White Island and Ruapehu.
Site has photos, references, links, and books.
Volcanos of Guatemala - All 34 official volcanos of Guatemala are described with photos. A basic volcano tutorial is also provided.