How to Make It
Combine ginger, sugar, water, and salt in a saucepan. Cook over medium, stirring occasionally, until sugar is dissolved, about 8 minutes. Remove from heat, and cool completely, about 2 hours. Pour through a fine wire-mesh strainer into a small glass measuring cup, discarding solids.
Combine fresh orange juice, bourbon, sparkling water, lemon juice, ginger syrup, and orange slices in a large punch bowl or pitcher. Stir to combine. Serve over ice.