$5 Medieval Stone Bridge Low-poly 3D model by SimonTGriffiths. Available on CGTrader with 1300 polys and 914 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 62.1 KB), OBJ (OBJ, filesize: 150 KB), ABC (Alembic, filesize: 76.8 KB), LWO (Lightwave, filesize: 86.1 KB), FBX (Autodesk FBX, filesize: 58.9 KB), BLEND (Blender, filesize: 582 KB), 3DS (3D Studio, filesize: 44.2 KB), TEXTURES (Textures, filesize: 9.52 MB)