These often are an excellent option for areas. Norman Island is famed for tales of buried treasure and is the inspiration for the book, "Treasure Island." Simply off Treasure Point is a series of caves, each more interesting than the last. The daily garden trips are led by qualified and well-informed docents. OAsk your hosts some concerns about their country and culture.
The Canadian couple who run it are always creating fascinating trips. Guided tours happen daily, all over the island. You can choose it up at different points around town consisting of Old Town, Seaport Village, the Gaslamp Quarter, Balboa Park, the zoo and now even Coronado. They will even offer you your own credit card or debit card that can be used anywhere in the world!