<p>The 3rd order Fresnel lens is visible.</p>
<p>The top of the Au Sable Lighthouse. Solar panels power the Coast Guard light that is mounted on the outside rail (not visible in this photo).</p>
<ul><li>Keywords: Pictured Rocks National Lakeshore; Pictured Rocks; piro; Au Sable Light Station; au sable; lighthouse; lake superior</li></ul>
NPS Photo
Taken on 29 September 2007
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