"When it comes to the greatest Danish invention of all time, it’s a toss-up between Legos and the open-faced sandwich. The latter is given the respect it deserves at Aamanns, which has elevated sandwich making to an art form. The lunch menu includes sandwiches made with smoked Icelandic salmon, beef tartare, or pickled herring, and, underneath it all, a slice of organic sourdough bread. Aamanns has a deli and takeout service, but it’s better to visit their restaurant, Aamanns Etablissement. Failing that, stop by the branch at the airport for your last meal in Denmark before you head home."