Nestled at the stern spanning two impressive levels, Fiorentino Restaurant presents a riveting blend of traditional and contemporary Italian cuisine in a setting that echoes the elegance of Italy itself. The ambiance, showered in gold and white hues and illuminated by lighting reminiscent of alabaster urns, offers open seating breakfast and lunch on sea days, and fixed seating dinner in two sessions. Signature dishes include succulent suckling pig and sea bream fillet, but it's the bottles of excellent olive oil and balsamic vinegar at dinner that truly steal the show, inviting diners to indulge in Italy's rich culinary heritage.

Adularia Restaurant is a culinary delight that spans the entire width of Deck 3, adorned with golden colors and mother-of-pearl details. Offering panoramic views on two sides, this venue serves the same exquisite menu as Fiorentino but stands out for its open dinner and occasional lunch on sea days. It's a place where every meal is a celebration of Italian gusto, ensuring a memorable dining experience with every visit.

Transforming from a bustling main buffet by day to an informal, open-seating dinner restaurant by night, Corona Blu offers a symphony of colors and flavors that cater to every palate. Its extensive buffet ranges from high-quality cold cuts and cheeses to Asian dishes and grilled meats, not to mention an impressive array of breads and pastries. The evening brings a menu identical to that of the two main dining rooms, allowing for a versatile dining experience where guests can arrive at their leisure.

For an upscale dining experience, Club Diadema, with its elegant decor of black, white, and touches of mauve, sets the stage for an Italian-inspired gourmet journey. This specialty venue demands reservations, offering an intimate setting with an open kitchen. The menu, encompassing four courses of sheer delight, ranges from spiny lobster Caesar salad to grilled tiger shrimp, making every dish a masterpiece. It's a testament to finesse, where ambiance and culinary artistry come together.

Tavola Teppanyaki is where the vibrant art of Japanese cooking takes center stage, offering a show that's as compelling as the cuisine is delectable. A chef prepares your chosen dish on a hot grill right at your table, turning mealtime into an engaging spectacle. With menu options ranging from vegetarian to deluxe dinners featuring wagyu beef or lobster, it promises an unforgettable dining experience.

At Samsara Restaurant, indulge in lighter, healthier cuisine without sacrificing flavor. This spa restaurant, adorned in calming Asian-themed decor, specializes in dishes focused on fish and seafood, offering a serene dining retreat. While guests in spa cabins enjoy complimentary access, others may reserve for a unique dining experience, highlighting the fusion of wellness and gourmet dining.

Piazza Pizza offers a slice of Italy with its artisanal pizzas, crafted and baked in the traditional way. Sit in an environment akin to the best Italian pizzerias, complete with red-and-white checkered tablecloths, and choose from a variety of toppings to customize your pizza. This venue, buzzing with activity from afternoon till midnight, provides a casual yet authentically Italian dining option.

For those with a sweet tooth, Gelateria Amarillo is a paradise found. Featuring an eye-catching multicolored gumdrop ceiling, this gelato shop offers 18 flavors of ice cream, along with macaroons, crepes, and pralines. It’s a delightful spot for a sweet break any time of day, inviting guests to indulge in the creamy luxury of Italian gelato.

Bar Bollicine, dedicated to the finer things in life, specializes in sparkling wines and cocktails, providing an elegant backdrop for socializing. Whether you're toasting a special occasion or simply enjoying the evening, this bar, with its sophisticated atmosphere, offers a diverse selection of sparkling delights to suit every taste.

Located in the heart of the atrium, Bar Eliodoro offers a vibrant atmosphere where guests can enjoy a drink while soaking in the lively ambiance of the ship. It's a perfect spot for meeting friends or family before dinner or a show, serving a wide range of beverages to cater to all preferences.

Bar La Buena provides an inviting outdoor setting to enjoy a cocktail or two under the stars. With its laid-back atmosphere and selection of refreshments, it's an ideal place to unwind after a day of exploring or to kick off an evening of entertainment on board.

For beer enthusiasts, Birreria La Fiamma is a haven. This brewpub offers a selection of craft beers in a setting reminiscent of a traditional English pub but with a modern twist. It's a place to relax, enjoy good company, and sample some of the finest beers from around the world.

The exclusive Cigar Lounge provides an elegantly appointed setting for cigar aficionados to indulge in their passion. With a selection of premium cigars and fine spirits, it's a sanctuary where guests can relax and savor the moment in a refined atmosphere.

Grand Bar Orlov is the pulsating heart of Costa Diadema's nightlife, featuring live music and a spacious dance floor where guests can dance the night away. It epitomizes the ship's lively entertainment scene, offering a vibrant setting for enjoying cocktails and performances.

Piano Bar Principe Nero offers a more intimate music experience, with live piano performances in a cozy ambiance. It's the perfect locale to enjoy a laid-back evening, listen to beautiful music, and enjoy a fine selection of drinks.

Vinoteca Huit-Huit caters to wine aficionados with an exquisite selection of wines from around the globe. Guests can participate in wine tastings, discover new favorites, and enjoy the sophisticated atmosphere that makes every sip a memorable experience.

The Wine Tasting Bar is an invitation to explore the world of wine through guided tastings led by knowledgeable sommeliers. It offers an educational journey into wine appreciation, making it a must-visit for anyone looking to expand their wine knowledge.