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500px provided description: Took a tour of Biosphere 2.  Couldn't stand exactly center, but liked the metal odd-ness of the stairway. [#stairs ,#skylight ,#steel ,#metal ,#stairway ,#off-center ,#irregular ,#Desert ,#Arizona ,#biosphere 2]</div>
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<a rel="nofollow" class="external text" href="https://500px.com/Grakkers">Brian Hunter</a></div>
Imported from <a rel="nofollow" class="external text" href="https://500px.com/photo/257148923/biosphere-2-stairway-by-brian-hunter">500px</a> (<a rel="nofollow" class="external text" href="https://web.archive.org/web/201807id_/https://drscdn.500px.org/photo/257148923/m%3D2048/v2?webp=true&amp;sig=126c997b700d82087e1ced7e5fd094cfff9c6b7528cec7ca59d8b0a03ea0c3f5">archived version</a>) by <a rel="nofollow" class="external text" href="https://www.archiveteam.org/index.php?title=500px">the Archive Team</a>. (<a href="https://iw.toolforge.org/import-500px/photo/257148923" class="extiw" title="toolforge:import-500px/photo/257148923">detail page</a>)