The Chapada Diamantina (Diamond Highlands), in the state of Bahia, is more than 250 miles from Salvador. It may not be near the ocean, but there is water everywhere, thanks to its altitude. Deep, green canyons winds between spectacular rock formations. Just east of the national park, in the drier and desolate Nova Redenção, there’s magic hidden underground. Discovered in 1920 during a quest for diamonds in the region, the Poço Azul or Gruta Azul (also known as the “Blue Pool,” “Blue Pit,” or “Blue Well”) is the largest submerged…
