Mavericks in America is one of the fiercest surfing locations in the world and few people dare to ride its waves.
Daredevil surfer Jeff Clark became the first person to conquer the mighty waves in 1975.
Mavericks has been called dangerous not only because its waves can reach up to 24m high, but because there is a cluster of rocks near to where the waves break.
Jeff said surfing in Mavericks feels like a four-storey building is coming towards you at around 30mph!
These days, a competition is held there every year, and some of the best big wave surfers from around the world compete to try their luck against the "Everest" of waves.
Watch Leah's report.