The drawbridge and sally port of the fort (Fort Jefferson). The figure is that of Captain S.A. Peterson, U.S. Coast Guard.  Dry Tortugas National Park (formerly Fort Jefferson National Monument). .
<ul><li>Keywords: structure; fort; visitor; u.s. coast guard; Architecture(NPS History Collection Themes); Military: Civil War(NPS History Collection Themes); Military(NPS History Collection Themes); Maritime(NPS History Collection Themes)</li></ul>
<bdi><a href="https://en.wikipedia.org/wiki/en:George_A._Grant" class="extiw" title="w:en:George A. Grant"><span title="American photographer">George A. Grant</span></a>
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1937<div style="display: none;">date QS:P571,+1937-00-00T00:00:00Z/9</div>
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