Can a floor covering still be considered to be a rug if it is made of wood? West Elm's Wood-Block Rug is an indoor-outdoor "rug" made of natural dark ebony-colored wood. It comes with a poly-PVC coated pad to prevent the rug from slipping against other surfaces.
It actually reminds me a bit of those orthopedic wooden bead car seat covers that were popular for a time, so it probably feels nice against your feet when you walk on it. Sizes and prices vary, but a 5' x 8' rug is $299.