Crystal Cave earns the title of the world’s largest known geode, and standing inside it makes that claim feel very real. The sheer volume of celestite packed into this single underground chamber is what sets it apart from any other known formation in the world. Discovered Accidentally In 1897Some of the best discoveries happen completely by accident, and Crystal Cave is a perfect example of that. Located 40 Feet UndergroundGetting to Crystal Cave requires a commitment, and that commitment comes in the form of stairs. Picking up a small crystal specimen or a piece of locally branded merchandise does not require a second thought at those prices.