Check out Ancient Ruin Low-poly 3D model on CGTrader for $10. High-quality mesh by 3D-Model-World: 35813 polys, 18213 vertices. PBR, Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 62.5 MB), OBJ (OBJ, filesize: 37 MB), FBX (Autodesk FBX, filesize: 59.1 MB), GLTF (glTF, filesize: 170 MB), TEXTURES (Textures, filesize: 53.4 MB)