Review of Carnival Mardi Gras deck 18 (Serenity-Sports-WaterWorks)
Serenity is the ship's adults-only retreat for passengers 21+ yo. This is a forward-location outdoor area with a pool, 2 whirlpools, massage huts, cabanas, Fresh Creations (chopped salad station / complimentary, made-to-order fresh salads), an exclusive sundeck for relaxation, sunbathing and evening dance parties.
The adult deck is complimentary (free entry) and accessible at any time. Both whirlpools (large-size outdoor hot tubs) are cantilevered (infinity pool type, with glass walls). The salad bar, whirlpools, and the waiter-served Serenity Bar are available between 8 am - 10 pm. Hours may vary depending on the cruise itinerary, port days/sea days, weather.
Serenity Deck is furnished with hammocks, premium wicker chaise lounges and clamshell chairs (plush seating, teal cushions), shaded seating areas with double loungers and plush wicker sofas, live trees for decoration. At regular bar prices, Serenity Bar's menu offers drinks and refreshments (cocktails, beer/buckets, wine, frozens, smoothies, shakes, soda).
The Ultimate Playground
The Ultimate Playground (aft on Decks 18-19) is a large family-friendly play area highlighted by the fleet's largest Carnival WaterWorks (aquapark, with 3x spiraling waterslides, a 2-lane racing slide, 1x tipping bucket) and an expanded SportSquare (multi-sports complex) with a Basketball Court, Ropes Course, 2-lane Power Walking/Jogging Track, Mini-Golf Course).
Also here is the "BOLT Ultimate Sea Coaster" (first at sea).