We went to Green Island with Great Adventures and spent a lovely afternoon on the island. The glass bottom boat ride was fun and we had a good time strolling along the paths and the beach of the island on our own. The sea was rough, but staff was very helpful and cooperative to help with our sea sickness. We especially appreciated the opportunity of a half day trip departing from Cairn at 1 pm. We were there for about 2.5 hours but thought it was enough.