Coursing down the steep slopes of the Andes, the Pastaza River meets the edge of the Amazon jungle when it"s forced through a narrow channel that concentrates the river"s power like a firehose. The roiling torrent then shoots over the edge of this mountainside, plunging 200 feet into a cauldron-shaped pool. Agoyán, better known as El Pailón del Diablo (The Devil"s Cauldron), is Ecuador"s tallest and most famous waterfall. It"s a highlight of the Ruta de las Cascadas (Route of the Waterfalls), a popular circuit of the many waterfalls and hot springs near the mountain town of Baños de Agua Santa.