$15 Watchtower 3D model by mustafaefe. Available on CGTrader with 2088 polys and 3618 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 532 KB), OBJ (OBJ, filesize: 589 KB), BLEND (Blender, filesize: 1.79 MB), FBX (Autodesk FBX, filesize: 435 KB)