The Dewa Sanzan pilgrimage is a spiritual journey in Japan that involves visiting three sacred mountains: Mount Haguro, Mount Gassan, and Mount Yudono. This pilgrimage is part of the Shinto and Buddhist traditions, where participants seek purification and enlightenment through nature and ascetic practices. Pilgrims typically start at Mount Haguro, which features a famous five-story pagoda, before moving on to Mount Gassan and finally Mount Yudono. Each mountain offers unique experiences, including ancient shrines and breathtaking views, making the Dewa Sanzan a significant cultural and spiritual experience for many.