The Agua Caliente is a classic cocktail that was created in the 1920s most likely in Mexico because its name is a reference to the racetrack in Tijuana. The recipe is traditionally made with tequila, lime, simple syrup, berry liqueur, grenadine, and soda water, and it is considered to be the earliest known version of the Tequila Sunrise.
Fill a highball glass with cracked ice.
Add tequila, lime juice, simple syrup, crème de cassis, and grenadine to highball glass.
Using a bar spoon, gently stir for 5-7 seconds.
Top with soda water.
Garnish with lime wheel.