Angel Falls in Venezuela, the world's highest uninterrupted waterfall (979m), is not fed by a traditional lake or melting glacier. Instead, it is supplied by heavy tropical rainfall that falls directly onto the massive, flat-topped Auyán-tepui plateau. Because the tepui is a giant sandstone formation covering over 700 square kilometers, it acts like a massive "sponge" that collects the immense humidity and rain common in the Amazon basin. This water then flows into the Churún River, which meanders across the plateau before dramatically plunging over the edge. In 2026, scientists note that during the "dry season" (December to April), the water volume can decrease so significantly that the falls turn into a fine mist that evaporates before reaching the ground. The "recharge rate" is so fast that a single heavy afternoon thunderstorm on top of the plateau can transform the falls back into a roaring torrent within hours, making it one of the most dynamic hydrological systems on the planet.