Sistema Cheve is a deep cave located in the Sierra Juárez mountain range in the southern Mexico state of Oaxaca. As of June 2023, its deepest point has been measured at 1,529 metres deep, This makes it the second deepest known cavern in Mexico and the Americas, as well as the world's 11th deepest cave. More than 55 miles of passageways hav…Sistema Cheve is a deep cave located in the Sierra Juárez mountain range in the southern Mexico state of Oaxaca. As of June 2023, its deepest point has been measured at 1,529 metres deep, This makes it the second deepest known cavern in Mexico and the Americas, as well as the world's 11th deepest cave. More than 55 miles of passageways have been mapped within the cave.