The Earth Science World Image Bank has photographs of all aspects of Earth Science available to the public, educators, and the geoscience community from the American Geological Institute. This also includes information about geoscience careers.
Major U.S. government site for geological information. They have been actively scanning their publications, so check here if you need USGS maps, Professional Papers, or other publications from them.
This viewer allows the user to perform a number of different applications including, but not limited to, viewing metadata, customizing images, and displaying map information layers.
This USGS site shares research to develop and disseminate scientific information needed for understanding the ecology and values of our nation's wetlands.