A recent addition to ArcGIS Online is that of 3-D scenes making it possible to venture through canyons and across mountains experiencing changes in elevation and terrian. The Early Trails of Yosemite 3-D scene provides an example. The map allows students to explore the early routes of explorers and visitors into Yosemite Valley. Links beneath the map provide first hand narrative descriptions of the experience of coming to Yosemite in the late nineteenth and early twentieth centuries. The software does require a desktop browser that supports the graphics used. Check here for requirements.

Scene navigation is somewhat different than that in 2-D maps. The gallery below provides help.