The Czech Sour is a whiskey-based cocktail that is popular in Prague. It is made with Czech whiskey, lemon juice, sugar, and a dash of bitters. The combination of the smooth and smoky Czech whiskey with the tartness of lemon juice creates a balanced and refreshing cocktail. This drink is often garnished with a cherry or a lemon twist. The Czech Sour is a great choice for whiskey enthusiasts visiting Prague.