Poço do Céu is a waterfall and natural swimming hole tucked within the Serrinha do Alambari, an Environmental Protection Area (APA) in the state of Rio de Janeiro, roughly 30 minutes from the town of Penedo.

It sits at the heart of a circuit of four waterfalls — Poço do Céu, Dinossauro, Turmalina, and Laje — connected by a trail of approximately 1. 5 kilometers. The pools are celebrated for their exceptionally clear, cold water and striking color.

Because the Serrinha do Alambari carries protected status, conservation is a guiding principle for all visitors, and the site has minimal commercial infrastructure on-site.