For decades, big-wave surfers have searched the globe for the next behemoth. But what if the biggest wave on Earth hasn't been discovered yet? That's the intriguing question posed by big-wave surfer Ridge Lenny in a recent video. And the more you think about it, the harder it is to dismiss. "Is it possible that the world's best and biggest waves have yet to be discovered?" Lenny asks. "I think it's pretty darn likely." His reasoning is surprisingly simple. Many of today's most iconic big-wave breaks weren't uncovered in some remote corner of the planet. They're relatively close to population centers and have been hiding in plain sight for years. Yet even those waves took decades to enter surfing's consciousness. Take Nazaré , Portugal. While local fishermen and residents had long witnessed the canyon-fueled monster, it wasn't until 2011 that surfers truly began riding the wave on its biggest days. Today, it's widely regarded as the home of the largest waves ever surfed.…