The Eucalyptus Martini is the creation of Humberto Marques, mixologist and owner of Curfew in Copenhagen. Marques' focus for cocktails is on fresh ingredients, and has put together, not only great drinks, but a guide to using Herbs and Spices in the Cocktail Mixology.
The eucalyptus syrup is fantastic and makes this drink what it is. It is truly unique and has a cooling, refreshing sweetness. I've seen two copies of this recipe, in one he uses Tanqueray 10 and in the other, Martin Miller's Gin. I used Tanqueray 10 and thought it a great pairing.