Blaze Breaks Out At Popular Local Tourist Destination... December 20, 2007 WCBC Firefighters have extinguished a fire in a two-story building connected to the Crystal Grottoes Caverns. All firefighters have evacuated the building, and they are clearing smoldering debris on the outside. The grottoes are a series of caves on Shepherdstown Pike outside of Boonsboro. They are a popular tourist attraction, and school children often go on field trips to that destination. There aren’t any reports of any injuries. It is not clear how the fire started.