This is where the Yamabushi used to accomplish the purification water ritual (misogi 禊) before climbing Mt. Haguro when the roads didn't exist yet. The red bridge that connects the area with the small shrines and the Suga Falls is called Shinkyo 神橋 ("the divine bridge"). Before the 1870s, when Dewa Sanzan converted to Shintoism under the pressure of the government, the bridge used to be called Fudo no Hashi 不動の橋 ("Acala's bridge"), and the Suga Falls were called Fudo no Taki 不動の滝 ("Acala's Falls"). Despite its Shinto identity now, there are still Buddhist statues of Acala in front of the waterfalls.