Loop near <a href="https://en.wikipedia.org/wiki/Georgetown,_Colorado" class="extiw" title="w:Georgetown, Colorado">w:Georgetown, Colorado</a>. (<a href="https://en.wikipedia.org/wiki/Georgetown_Loop_Railroad" class="extiw" title="w:Georgetown Loop Railroad">Georgetown Loop Railroad</a>.)
A photochrom postcard published by the <a href="https://en.wikipedia.org/wiki/Detroit_Publishing_Co." class="extiw" title="en:Detroit Publishing Co.">Detroit Photographic Company</a>.
<bdi><a href="https://en.wikipedia.org/wiki/en:William_Henry_Jackson" class="extiw" title="w:en:William Henry Jackson"><span title="American photographer and painter (1843-1942)">William Henry Jackson</span></a>
</bdi>
between circa 1897 and circa 1924 <div style="display: none;">date QS:P,+1500-00-00T00:00:00Z/6,P1319,+1897-00-00T00:00:00Z/9,P1326,+1924-00-00T00:00:00Z/9,P1480,Q5727902</div>
<a href="https://en.wikipedia.org/wiki/Beinecke_Rare_Book_and_Manuscript_Library" class="extiw" title="en:Beinecke Rare Book and Manuscript Library">Beinecke Rare Book &amp; Manuscript Library</a>, <a href="https://en.wikipedia.org/wiki/Yale_University" class="extiw" title="en:Yale University">Yale University</a> (<a rel="nofollow" class="external autonumber" href="http://beinecke.library.yale.edu/digitallibrary/america.html">[1]</a>).