Sometimes you don't even have to travel to visit a "foreign" supermarket.

If you live in the SF Bay Area there are dozens of great opportunities to visit international supermarkets.

I'm particularly fond of the Korean supermarkets in Daly City - I like Kukje and Jagalchi.

We're honestly spoiled for choice though. We have great Asian supermarkets, there are Central and South American supermarkets all over the place, Jai Ho Indian Grocery Store in the Fillmore, Nijiya Market in Japantown... tracking down and trying these places out is a really fun micro-hobby.

One tip: this is even more fun if you do a tiny bit of research first and go with a recipe in mind. That gives you a quest you can structure your visit around. When I go without a recipe I end up with a basket full of weird stuff that I don't know how to use. With a recipe I still have that weird stuff but I also have at least one actionable meal.

Similar story in Sydney, Australia. No shortage of Indian, Chinese, Korean, etc, grocery stores. Always fun to explore them and try something new.