The Calvi Collins is a refreshing and citrusy cocktail named after the picturesque town of Calvi in Corsica. This cocktail is made with gin, lemon juice, simple syrup, and soda water. The combination of gin and lemon juice creates a tart and zesty flavor, while the simple syrup adds a touch of sweetness. Shake the ingredients with ice and strain into a tall glass filled with ice cubes. Top with soda water and garnish with a lemon slice. The Calvi Collins is a perfect choice for those hot summer days in Corsica.