Back on Okinawa in the early 50s, our Control Tower crew used to go to a very small hut called the EM Club and get a case of San Miguel (MacArthur beer) for a nickel a bottle.
After a while we'd get the munchies and the only thing the Okinawan who ran the joint had was canned octopus.
Got to be right tasty after six brews.
One of the most intriguing tastes I've ever had was Corn Smut down in Mexico. They saute it and put it in a soft flour tortilla with a tomatillo-green chile sauce. Down there they call it Huitlacoche. it has a very earthy taste like truffles. Sounds horrible but it's good.