The Mexican State of Chihuahua has become quite famous, thanks to its namesake dog. However, it is also home to one of the most amazing Crystal Caves - Unlike any other found in the world.

The cave is located in a working mine, 1000ft below the ground in the Naica mountain which lies in the Chihuahan desert. It was found in 2000 by two brothers, Juan and Pedro Sanchez, who were drilling a mining tunnel, when they stumbled upon it. Knowing they had found something quite amazing, the duo reported it to the engineer, who quickly re-routed the tunnel, so that the cave could be preserved.

Often called The Sistine Chapel of Crystals, the cave contains over 170 of the largest natural crystals ever found, with the tallest one measuring about 37 feet and weighing in excess of 55 tons. The entire cave is covered with the shiny ice-like crystal beams jutting from the cave sides, as well as the floor.

After years of research, scientists were able to solve the mystery of how the crystals here grew so large. The Naica Mountain was formed as a result of volcanic activity about 26 million years ago. The magma, saturated with a mineral called anhydrite dissolved with the gypsum (the mineral which the crystals are made of) to produce tiny crystals. Because the temperature in the cave is consistently warm and stable, the crystals thrived and grew to these amazing levels.

The ice-like crystals make these caves look deceptively cool. In reality the temperatures here exceed 112 degrees Fahrenheit, and the humidity is 80-90%. It is so warm that the mineworkers who visit, have to wear protective suits and carry backpacks of ice-cooled air. However, this and the fact that it takes twenty minutes to get to the caves, has not deterred would-be thieves from trying to steal some of the crystal. In order to preserve them, the authorities had to construct a thick-iron gate outside the caves.

Scientists believe that there are many other caves like this, just waiting to be discovered. Meanwhile we have the Cueva des los Christales or Cave of Crystals that definitely ranks amongst one of the most amazing natural wonders of the World today.

Sources: crystallnks.com, nationalgeographic.com