Mount Roraima (Spanish: Monte Roraima, also known as Tepuy Roraima and Cerro Roraima; Portuguese: Monte Roraima ) is the highest of the Pakaraima chain of tepui plateau in South America. First described by the English explorer Sir Walter Raleigh i.
Cueve de los Cristales (Cave of Crystals) Naica, Chihuahua Mexico. The main chamber is 136 degrees F and nearly humidity. It contains selenite crystals, some of the largest ever found feet long, 13 feet in diameter and 55 tons in weight).