Geology
Plate Tectonics - From Windows to the Universe. Contains several levels as well as Spanish.
Earthquakes - You can view the plates as well as the different type of boundaries.
Fault Motion Animations from IRIS.
Faults - types of faults
Marine Photobank - The Marine Photobank, a program of SeaWeb, provides beautiful and powerful images of many things marine. All of the imagery is available for free for non-commercial purposes and for media use.