A new app lets users explore Mount Everest in lifelike detail without ever having to leave the couch. Called Mount Everest 3D, the iOS app shows the world's highest mountain from "any perspective" in the form of a 3D map, according to its App Store description. = Created by German company 3D RealityMaps, the map is based on high-resolution images from WorldView satellites, and details common routes, base camps and weather stations.