Poço Azul, located in Nova Redenção within Chapada Diamantina, Bahia, is a mesmerising flooded cave renowned for its crystal‑clear blue waters. Visitors can swim or float in the tranquil pool, admire the striking light effects when the sun’s rays penetrate the cave, and enjoy guided eco‑tours that highlight the site’s natural beauty. Notably, the cave reaches depths of around 20 metres and is celebrated for its seasonal phenomenon where sunlight refracts to illuminate the water in vivid shades of blue, making it one of Chapada Diamantina’s most enchanting attractions and a must‑see destination for nature lovers and photographers.