Costa takes Italy's 'La Notte Blanca' festivities to sea

The vessels will be dressed in white decorations, from the bars to the restaurants, and themed programs for different ages and nationalities will include treasure hunts, trivia quizzes and flash mobs taking place at unexpected venues during the day.

At dinner in the main dining room, a special white dessert will be served, and bartenders will demonstrate how to prepare white-themed drinks like apricot daiquiri, piña colada, White Russian and White Lady.

Starting at 10 p.m., a big White Party at the pool will feature decorations including ice sculptures, plus dancing, DJs and Costa's professional dancers performing on special platforms with lighting effects. White glow necklaces will be distributed, and participants can taste strawberries dipped in white chocolate.