Torres Del Plains, Patagonia, South America topographical model created using Blender, a 3D modeling, open source software, which you can download from Blender.Org.
STL (Stereolithography, filesize: 51.6 MB), OBJ (OBJ, filesize: 78.8 MB), DXF (DXF, filesize: 959 MB), DAE (Collada, filesize: 222 MB)