 They're dark brown, goopy-looking, and one reviewer said about them, they, quote, look as disgusting as they taste. Other dishes in the nauseating top ten include fish entrail soup from Thailand and fermented shark flesh from Iceland. The U.S. has two dishes on this list. At number seven, it's the Luther Burger, one of the world's unhealthiest burgers. That's a bacon cheeseburger sandwiched between glazed donuts instead of an ordinary bun.