Nohoch Nah Chich
From Wikipedia, the free encyclopedia
Nohoch Nah Chich is the world's third longest known underwater cave system. Only Sistema Sac Actun and Sistema Ox Bel Ha are longer. Nohoch Nah Chich is Mayan for Giant Birdcage. It is located south of Playa del Carmen, Quintana Roo, Mexico.
It was discovered that Nohoch Nah Chich is connected to the Sac Actun ("White Cave"). This makes it the world's longest underwater cave system.[1]