Riding the Paiva: A Wild Day of Canoe-Rafting from Porto

You feel the river before you see it: a low, persistent rumble that grows into a throat-clearing rush as the Paiva squeezes through granite and shale. On a cool morning the water throws up a smell of moss and stone; sunlight freckled through oak and eucalyptus lights the canyon like a slow shutter. Our guide throttles the inflatable canoe-raft into a seam of current and the first rapid bites. The boat rocks, the group laughs, someone whooped, and for a few heartbeats the outside world has been reduced to paddle, river, and the thin, precise math of moving downriver.