Created in 1949, this Italian aperitif is flavoured with artichoke leaves (Cynara scolymus), from which the drink derives its name and 12 other botanicals...
If you can get hip to its flavors, especially its brand of bitterness, this could be your house amaro. Use it as a sub for all the others. I haven't found one as versatile.
Replying long after the fact, mostly for the benefit of potential beginners who may not know, but Campari and Cynar are not all that similar. It's like saying "I prefer bourbon to Scotch". Yes they're both whiskeys, but that doesn't make them interchangeable.