Fill a large pot with water and bring it to a boil.
Add salt and Old Bay seasoning to the boiling water.
Add the baby potatoes and cook for 10 minutes.
Next, add the corn and cook for another 5 minutes.
Stir in the mussels, clams, and crab legs.
Cook for 5-7 minutes until the shellfish open.
Finally, add the shrimp and cook until pink, about 3-4 minutes.
Drain the pot, reserving a bit of the broth for serving.
Transfer the seafood and vegetables to a large serving platter.
Garnish with lemon halves and serve with the reserved broth.