We did the Cultural Highlights....as we were doing snorkel "stuff" most other days on the trip and thought we should "see" the island. It was o.k. Went to see Vanilla, some Mares (old temples) stopped in the town Fare for a bit. Others just took the bus to town (Regent provided it). Oh....also stopped on the tour and saw the blue eyed eels and the guide fed them. If you are interested in that kind of thing that is an option. I don't recall others having much to say...about any other tours. Some did the "tour" on their own...with a van and driver. I have no other input on this....hopefully others will be more informing! We were only their 1/2 day.
Enjoy,
Carol