Earth Science research and education increasingly demand the integration of geospatial datasets to observe and model natural phenomena. To meet this challenge,Harvard University and the Structural Geology & Earth Resources Group have developed a state-of-the-art immersive 3D stereo Visualization Facility. The facility uses three digital projectors in active stereo mode displaying on a 23 ft wide cylindrical screen. The image source was originally an 8-cpu, 16GB shared memory SGI Onyx with two Infinite Reality 4 1GB memory graphics pipes. The current image sources are a 4-cpu 128GB shared memory Linux system with Nvidia Quad FX Pro 5800 graphics units, augmented by a ScalableGraphics DTC Windows cluster system.