Once upon a time in Denmark, somebody had the idea of declaring bread with butter a national dish. And ever since, Danes claim to be the unique inventors of bread (in particular rye bread) with butter.
The art of decorating traditional Smørrebrød has been documented in beautifull pictures by quite some people. One of the best ones, you can find on the web, is this guy:
The site gives you tons of decorating tips for Smørrebrød; a task which can easily turn into a hobby… Also, for all none-Danes around you, recipes to make your own rye-bread at home are included as well. So much talking about Smørrebrød makes me hungry, so I am gonna have some now… Smørrebrød is by the way very delicious!
Here the original stuff on display in Denmark: