What are the best surfing spots for experiencing the massive waves in Portugal, particularly in Nazare?

The best Surfing spots in Portugal for experiencing massive waves, especially in Nazare, are Praia do Norte and Praia da Nazare. These spots are known for their big waves, with Praia do Norte being famous for its record-breaking waves. Surfing at these spots requires advanced skills and experience due to the powerful and challenging conditions.