$7 Octagonal Heliport Low-poly 3D model by artmeshstudios. Available on CGTrader with 22880 polys and 13168 vertices. Check it out on CGHub.
BLEND (Blender, filesize: 2.55 MB), OBJ (OBJ, filesize: 1.56 MB), FBX (Autodesk FBX, filesize: 61.4 MB), GLTF (glTF, filesize: 79.8 MB), DAE (Collada, filesize: 3.25 MB), TEXTURES (Textures, filesize: 85.2 MB), PNG (PNG, filesize: 85.2 MB)