The Blue and limpid water of the <i>Poço Azul</i> (Blue well) rich in bicarbonates of calcium and magnesium - <a href="https://en.wikipedia.org/wiki/Chapada_Diamantina" class="extiw" title="en:Chapada Diamantina">Chapada Diamantina</a> BA, (2011)
<a href="//commons.wikimedia.org/wiki/User:Lauro_Sirgado" title="User:Lauro Sirgado">Lauro Sirgado</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>