About McDonald's Cardiff Bay Retail Park Cardiff. Since 1974, McDonald's has been dedicated to serving quality food and quick service, at an affordable price for our customers. Visit McDonald's Cardiff Bay Retail Park Cardiff and choose from a menu of favourites, including McCafé® coffee, tasty breakfasts, delicious burgers like our Quarter Pounder®* with Cheese, McPlant, and more! Before you head out, check out the latest offers and order your food ahead on MyMcDonald’s app. Next time you’re looking for a treat, head to McDonald's Cardiff Bay Retail Park Cardiff . We look forward to serving you!