Nazaré Canyon is a deep underwater canyon located off the coast of Nazaré, Portugal. It stretches approximately 230 kilometers long and reaches depths of over 5,000 meters. The canyon is known for its unique geological features and plays a significant role in ocean currents and marine ecosystems. The canyon is famous for producing some of the largest waves in the world, attracting surfers from around the globe. These massive waves are primarily generated by the underwater topography of the canyon, which funnels and amplifies swells from the Atlantic Ocean, making it a popular spot for big wave surfing events.