Surströmming is fermented herring that's known for its strong and pungent odor. It's usually eaten with flatbread, potatoes, onions, and sour cream, but its intense smell can be off-putting to many.
Also known as blood pudding, this sausage-like dish is made from congealed blood, typically from pigs or cows. It's sliced and fried before serving, and its rich, metallic taste isn't for everyone.
Haggis is a traditional Scottish dish made from sheep's stomach stuffed with a mixture of minced sheep's heart, liver, and lungs, along with oats, onions, and spices. While loved by some, its ingredients might make others hesitate.
Casu marzu is a Sardinian cheese that's left to ferment with live insect larvae. The larvae break down the cheese, giving it a soft and creamy texture. Eating it while the larvae are still alive is a delicacy in some regions.
Lutefisk is dried fish, typically cod, that has been soaked in a lye solution. It's rehydrated and served with butter or white sauce. Its gelatinous texture and strong smell can be polarizing.