Industrial factory or power plant. Polygon 3 + 4 vertices mesh. Can be used as decoration / background. Everything in one packed FBX file 2016 and 2014 (Unity mode) and some other formats. Please give me feedback if you need any other 3d format.
STL (Stereolithography, filesize: 39 Bytes), OBJ (OBJ, filesize: 1.13 MB), FBX (Autodesk FBX, filesize: 70.8 MB), LWO (Lightwave, filesize: 2.63 MB), 3DS (3D Studio, filesize: 2.27 KB)