When it comes to liqueurs, Italians make more than Campari. They also make stuff like amaretto. And then there is Disaronno. It doesn't contain almonds like amaretto, but has apricot kernel oil and other herbs and spices. It's a whole ball of bittersweet yummy. And apparently it makes great sour cocktails, too.
Disaronno "Disaronno sour" (2013) :15 (USA)