  We report on a new type of continuous electromagnetic metal planar
meta-material, which resembles a `fish scale' structure. It is highly
transparent to electromagnetic radiation throughout a broad spectral range
apart from at one isolated wavelength. When the structure is superimposed on a
metallic mirror it becomes a good broadband reflector everywhere apart from one
wavelength where the reflectivity is small. At this wavelength the reflected
wave shows no phase change with respect to the incident wave, thus resembling a
reflection from a hypothetical zero refractive index material, or `magnetic
wall'. We also discovered that the structure acts as a local field concentrator
and a resonant `amplifier' of losses in the underlying dielectric.
