A manhole that sticks up out of the ground. You could surround this model with grass or make it flush with the top of a road. Saved as a Blender file. Rendered with Cycles at 125 samples.
Meshes without materials are available in DAE, 3DS, FBX, OBJ and STL formats. The 4096x4096 diffuse and normal maps are provided.
BLEND (Blender, filesize: 90.2 MB), OBJ (OBJ, filesize: 304 KB), FBX (Autodesk FBX, filesize: 1.91 MB), STL (Stereolithography, filesize: 260 KB), DAE (Collada, filesize: 636 KB), 3DS (3D Studio, filesize: 105 KB)