Hákarl is a national dish of Iceland that not many dare to try. Hákarl consists of Greenland shark cured with a particular fermentation process and hung to dry for four to five months. Such a long preparation can be explained by the fact that Greenland sharks are deprived of the urethra which makes their meat quite inedible. But the Vikings, so as to avoid starvation, found a way to consume the shark. Their recipe has been preserved and followed to this day. However, this is not to say that the dish is something Icelanders eat every day, it's more of a delicacy. You can also try the “Viking food," however, I don't recommend doing it indoors.