ArcScene is a 3D visualization application that allows you to view your GIS data in three dimensions.
ArcScene allows you to overlay many layers of data in a 3D environment. Features are placed in 3D by providing height information from feature geometry, feature attributes, layer properties, or a defined 3D surface, and every layer in the 3D view can be handled differently. Data with different spatial references will be projected to a common projection, or data can be displayed using relative coordinates only. ArcScene is also fully integrated with the geoprocessing environment, providing access to many analysis tools and functions.