Fill a large pot with water and bring it to a boil.

Add the potatoes, corn, sausage, garlic, cayenne pepper, and Old Bay seasoning to the boiling water.

Boil for about 15-20 minutes or until the potatoes are tender.

Add the cleaned crawfish to the pot and stir well.

Boil for an additional 3-5 minutes until the crawfish are bright red.

Turn off the heat and let the pot sit for 5 minutes.

Drain the mixture using a strainer and transfer to a large serving platter.

Garnish with lemon wedges and parsley before serving.