Put in Bay's Crystal Cave was discovered by workers in 1897. They stumbled upon this marvel as they were preparing a well for Heineman's winery some 40 feet above. Put-in-Bay's Crystal Cave has the world's largest geode inside and has tours daily during the season. The walls of this Ohio treasure is covered in strontium sulfate, a bluish mineral classified as celestite. Crystals have been harvested previously for firework production.
See you UNDER THE BAY!!!!!!