In the year 2000, the “Cave of the Crystals” was discovered by miners excavating a tunnel for the Naica Mine in Mexico.
The main chamber contains some of the largest natural crystals ever found in any underground cave, with the cave’s largest crystal found to date measuring at 36 ft (11 m) in length, 13 ft (4 m) in diameter and 55 tons in weight.
In Guatemala, archeologists have also discovered 800 km worth of tunnels which have been mapped underneath the Mayan pyramid complex at Tikal.
Tikal is an ancient Mayan citadel in the rainforests of northern Guatemala. Its iconic ruins feature the massive, ceremonial Lost World Pyramid, the Temple of the Grand Jaguar.
At 70 meters, Temple IV is the tallest pre-Columbian structure in the Americas. Could there be hidden passages built beneath the site? If so, who could have built them?