About 95 percent of all bourbon is produced in Kentucky. What makes it so good is that Kentucky is blessed with limestone-rich aquifers that deliver the product’s most essential ingredient: extraordinary water. If you haven’t noticed, bourbon is back in a big way. And its resurgence has led to expansion by both the big boys and a growing cadre of craft distilleries. You can see many of them in action on what is called the Bourbon Trail. Guided tours take visitors through the production process and culminate in fun, educational tastings.