The volcano is a location on the Duel Academy island in Yu-Gi-Oh! GX. Looming just behind the Academy, several events in the series take place here.
Nightshroud, the first of the Shadow Riders, Dueled Jaden Yuki here. Atticus Rhodes would later Duel Zane Truesdale on the side of the volcano during the Genex Tournament.
In season 4, this was where Kagemaru and Sartorius warned Jaden about the new evil that would attack the island. Trueman soon appeared to duel Jaden a second time.
In the manga, this was where Zane Dueled against Chazz.