A TREASURE CHAMBER 300 METRES DEEP
Scientists from six different nations have been exploring the Naica caves for the past three years. They’ve been measuring the crystals and taking samples of rock in order to learn more about prehistoric earthquakes and groundwater movements. Their research has uncovered three more crystal caves (see diagram right). The caves have since been sealed because the influx of air was causing the selenite columns to slowly disintegrate. Once they are reflooded with water, the crystals will begin to grow again.