They're sometimes called "gumbo pots"

Cast iron dutch ovens are often called "gumbo pots" in cajun country, and that's for a good reason! Here's a good gumbo recipe:

First and foremost, do yourself a favor and use a 7 quart pot. Okra expands during cooking and I didn't know that. I had 2 spillovers and 2 extra pots to clean because I didn't use a big enough pot!

Make a roux by using 2 tbsp cooking oil and 2 tbsp flour. You can do this directly in the pot, or in a small skillet, or (gasp!) in the microwave.

Then pour in the stock. Chicken or seafood stock will do. Then add the other ingredients.

Use whatever meat you want; I used shrimp, crawfish and precooked smoked sausage. If you're using chicken or pork, I would cook it first.

Then add okra and whatever other veggies you want. Okra is NOT optional, as it gives the gumbo its unique texture. I used chopped onion, celery, okra, and canned tomatoes.

Eggplant is also good in gumbo.

Then add spices. I used chef paul's no salt, onion powder, garlic powder, and kitchen bouquet.

Bring to a boil and then simmer until done.