today, thanks in large part to garrett mcnamara, the water is now crowded with them. gather around a 100-year-old lighthouse, to watch the incredible rides, and dangerous falls. >> mcnamara: it's like "water world." like, dog fight for waves now. it's really funny. >> cooper: people are competing for waves. >> mcnamara: yeah, competing, fighting. yeah, full on. >> cooper: surfers want to challenge themselves here in nazareÉ. >> mcnamara: this is the proving ground, when it comes to a team. much more about teamwork here. you need somebody with a jet ski to watch over you. and once it gets over 60 feet, everybody's challenging themselves and their skills here. foe .gs mcnamara: oh, the-- it's almost more dangerous because you got this big machine. all a sudden, if a wave lands on you and you're stuck with the machine... >> cooper: last november, mcnamara was riding a jet ski, towing his friend, british surfer andrew cotton, into this massive wave in nazareÉ. it didn't go as planned. >> mcnamara: ( bleep ) this thing literally exploded like a bomb. and he flew into mid-ai