We booked a shore excursion called "Nassau Sightseeing & Ardastra Gardens". We met our tour guide on the pier. He took us in a 10-passenger van to see all of the historical sites in Nassau - The Queen's Staircase, Fort Fincastle, the lighthouse, etc. He was very knowledgable and let us out to explore each of the points of interest. Then, we carried onward to Ardastra Gardens. It is a conservation area and zoo. The landscaping was beautiful - tropical and lush - and the grounds were very well-kept. The zoo offered a wide array of exotic animals. There are no barriers, so guests may approach the cages cautiously. If you are bringing children here, be alert for their safety. We were also able to see a great Marching of the Flamingoes show.
After our tour, we went back to the pier area to look through the local Straw Market and shopping area. It's very hot and crowded in there, but there are so many locally-made treasures (arts & crafts) to be acquired. There are various local vendors located around the port area. They are not overbearing at all. I was very comfortable to say a simple "no thank you" if I was not interested.
I'm looking forward to going back there on my next cruise!