Hands down the best excursion we have ever experienced was to Prickly Pear Island off the coast of Antigua. The island is small and only accommodates a certain amount of people. A short bus trip drops you off on a beach and you have to wade into the water to climb aboard a small motor launch that takes you to the island. They have lounge chairs and umbrellas set up on the island and rum punch (also very rustic restrooms). You could snorkel with a group around the island or just relax on the beautiful beach...my grandson found a beautiful starfish not far from the beach. The islanders were diving for conch, got those huge conchs out of their shells and sliced it up for everyone to try raw with some lime. It was the best excursion ever.