Last weekend I drove to Harrisonburg, Virginia to bring my son a piano keyboard. He just started his freshman year at JMU and needed one for a music class. (The campus is now closing down, unfortunately, because of the pandemic, and we’ll have to go pick him up this weekend. But last week, we had no idea how soon that was coming. Last Saturday, we took an excursion to nearby Grand Caverns, in the fittingly named town of Grottoes. Grand Caverns, formerly called Weyer’s Cave, is a limestone cavern system that was the the nation’s first show cave, opening for tours in 1806. During the Civil War’s Shenandoah Valley campaign, both Union and Confederate troops camping nearby visited the cave and left their signatures on the rock faces. The cave has scientific significance, too. In addition to some really splendid stalactites, stalagmites, and flowstone formations, it has one of the highest concentrations of shield formations of any known cave.