The Costa ship, Costa Concordia, is the best ship in the Costa fleet for fitness and relaxation. Completely innovative, this floating resort becomes an additional destination on your cruise. What makes this Costa Cruise ship so special? To start with, there is a fitness area on two decks, covering a total of almost 20,450 square ft., with a swimming pool in its center. The beautiful Samsara Suites have direct access to the Spa.