National Geographic TOPO! Streets & 3-D Views Expansion Pack CD-ROM

The TOPO! Streets 3-D Views Expansion Pack is a great addition to the TOPO! State Series CD-ROMs (sold separately), enabling you to fly along the trail you've drawn as it winds and climbs to your destination. You can even stop anywhere along the trail and zoom and pan to see the view. Resizeable split screens make it easy to expand any screen for better viewing.