Roman baths of hot water, "Bagno Grande" in <a href="//commons.wikimedia.org/wiki/San_Casciano_dei_Bagni" title="San Casciano dei Bagni">San Casciano dei Bagni</a>, Tuscany, Italy.
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<span class="int-own-work" lang="en">Own work</span>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>