These are phenomenal photos of a cave filled with giant crystals. It is 1000 feet below the Chihuahua desert in Mexico.
http://www.dailymail.co.uk/sciencet...ystals-discovered-1-000ft-Mexican-desert.html
On Put-In-Bay island in Lake Erie is a small cave which is actually a geode of crystal Celestine, but not as spectacular as the above cave.
http://en.wikipedia.org/wiki/Crystal_Cave_(Ohio)
http://www.dailymail.co.uk/sciencet...ystals-discovered-1-000ft-Mexican-desert.html
On Put-In-Bay island in Lake Erie is a small cave which is actually a geode of crystal Celestine, but not as spectacular as the above cave.
http://en.wikipedia.org/wiki/Crystal_Cave_(Ohio)