I was lucky enough to be able to travel overseas and stay for a while in many different places, both in the army and later with work. Staying in one place and getting to know some locals instead of spending a few nights in a hotel and moving on gives you a different perspective. It's interesting what foods they eat and how it is prepared in some places.
Some people may be familiar with kimchi, a fermented spicy Korean food made primarily from cabbage. It can smell up a room. I ran into other foods prepared much the same way in other places. Fermenting is a good way to preserve it. I'm not sure exactly what the spices contribute other than taste but most foods of that type seem to have them.
When I was in Kazahkstan I made sure I was never the guest of honor at a party. The guest of honor got to eat a real delicacy, the eyeballs. I don't know where that custom came from, maybe some kind of hunting tradition, but getting an eyeball was a special honor. It might be from a goat, might be from a big fish like a sturgeon. I don't know how much vodka I'd have to drink to get one of those down.
But yeah. dog in Korea, pickled herring in Denmark, horse in France, those smoked eels in the Netherlands, certain breakfast foods in Israel, and many things I just don't want to know from a lot of places. I tried many things. Some were good, some like those smoked eels once was too many, and some I just avoided all together.