The cave is covered in massive crystals, some reaching as long as 40 feet in length. The cave is extremely hot, with air temperatures reaching up to 58 degrees Celsius with 90-99 percent humidity. The cave is relatively unexplored due to these factors, without proper protection people can only endure 10 minutes of exploration time.
The cave is connected to the Naica Mine near the municipality of Saucillo. The crystals are located nearly a thousand feet below the surface of the mine.