In a small saucepan, combine sugar, ½ cup water, and 1 sliced lime. Bring to a boil over medium-high heat, stirring until sugar is dissolved. Remove from heat, and let stand for 30 minutes. Strain mixture through a fine-mesh sieve, discarding solids. Refrigerate in an airtight container for at least 2 hours or up to 2 weeks.
In a large pitcher, combine chilled simple syrup, wine, cucumber, remaining 2 sliced limes, honeydew, mint leaves, and basil leaves. Cover and refrigerate for at least 2 hours, stirring occasionally.
Notes
*Vinho Verde hails from the historic Minho province of Portugal and includes red, white, and rosé wines.
Recipe by Victoria at https://victoriamag.com/cucumber-basil-mint-sangria-blanco-recipe/