Icelandic; pressed and fermented shark. You have to love the idea of food prepared by sticking it in a hole in the ground.
Wikipedia: Hákarl is prepared by gutting and beheading a Greenland or basking shark and placing it in a shallow hole dug in gravelly-sand, with the now-cleaned cavity resting on a slight hill. The shark is then covered with sand and gravel, and stones are then placed on top of the sand in order to press the shark. The fluids from the shark are in this way pressed out of the body. The shark ferments for 6-12 weeks depending on the season in this fashion.