Spend an evening gliding along the Luminous Lagoon, sipping on Jamaican rum punch, with views of the Caribbean sunset and reggae music in the air. There'll be a fire dance and limbo show on board, so you won't be short of entertainment throughout the evening. If you feel like it, you can take the plunge into the bioluminescent waters of the lagoon as the sun sets. If you're lucky, you'll see the water lit up by microorganisms that emit a flash of light when touched – this is the brightest of four places this phenomenon can be seen.