$15 Realistic Forge Building Low-poly 3D model by Craftsman-CG. Available on CGTrader with 26364 polys and 28069 vertices. Check it out on CGHub.
BLEND (Blender, filesize: 2.55 MB), OBJ (OBJ, filesize: 1.17 MB), FBX (Autodesk FBX, filesize: 3.11 MB), TEXTURES (Textures, filesize: 1.48 GB)