1 region is Yucatán Peninsula and a dish from there is
Ceviche
Ceviche is a dish consisting of raw fish marinated in citrus juice (such as lime or lemon) and served with chopped onion, chiles, cilantro and sometimes fruit.
a 2nd region is Northern Mexico and a dish from there is
Cochinita pibil is a traditional Mexican slow-roasted pork dish.
- hope this helps