Some parts of the world have soaring mountains. Other parts are desert with the moving sand dunes. Then there are the flat to gently rolling areas. Rugged, hilly, marshy and the list goes on to describe the beautiful diversity of this blue earth. Lakes, rivers, oceans add to the beauty. From the earliest of times humans attempted to modify the shape and texture with all sorts of implements. Stones to dynamite to giant earth movers lay hills and mountains low. Other times, humans join countries with tunnels and bridges. Marshes become shopping malls. Imagination can be the best modifier.