Make the simple syrup by combining all ingredients into a pot and bring to a boil. Simmer until the syrup is reduced and nice and sticky. Set aside to cool completely. Overnight if you can.
Add the simple syrup, the bourbon, and the mint to a glass. Muddle the mint a bit.
Add the juice of the lime.
Fill the glass to the top with crushed ice.
Top with club soda and garnish with a few cherries and a sprig of mint if you like.