This natural phenomenon has more formations per square foot than any cave known to man. It is also the most naturally kept cave in the world. You are going to see this piece as it was developed back in the 1920's. Our tour guides will answer your educational, technical, historical and geological questions. The Crystal Grottoes Caverns were founded in 1920 when the State Roads Commission was quarrying for limestone to build up and pave State Route 34. After successfully quarrying back a cliff that was 35 to 55 feet high and 150 feet deep, an unusual event occurred. The next time they started to drill, they lost their drill bits in the cave. Later, when dynamite was detonated in the drill holes, the first entrance was produced. Price: $15; $10 child