The bootlegger’s Brigadoon? The Atlantis of alcohol? No, Bar Americano isn’t quite that hard to find. Still, the idiosyncrasies of its design (you may have seen larger shoeboxes) and the frosty balance of its European-inflected cocktails reward the intrepid imbiber. Is the Negroni served here truly the best in the world, as has been reported? Check it out for yourself.