For starters this is the link to the jet ski tour around bermuda. It was really amazing!!! They take you to a few ship reck sites and let you snorkel for a few minute if you want. Was probably our most fun activity
http://watersportssomersetbridge.com/
If I'm not mistaken you can book through the cruise ship, bit it's 3 or 4 times the price.
It's a small family owner business. . . really great service! Jetski's are a 5 minute bus ride from the boat. You don't have to worry about which way to take the bus because you can only go one direction.
http://watersportssomersetbridge.com/
Bermuda crystal caves were really cool! A bit of a hike, but in my opinion well worth it!!
http://caves.bm/
The caves are mid way point of the island. Once we were already half way across the island we took the bus to St George (which is the furthest east you can go). St George is not as touristy as the rest of Bermuda. We enjoyed mingling with the locals and seeing the cool art there.
Hamilton is the capitol (big city) of Bermuda. We went to the Bermuda Underwater Exploration Institute which was pretty cool! We also went to a really cool church that was hundreds of years old. Aside from that we stayed out of Hamilton.
Last day we went to Horseshoe bay. Really nice pink sand beach!!! I rented snorkel gear right on the beach. Didn't have to swim more than 30 feet to be over a reef! Was amazing!!
I would strongly reccomend going to the Frog and the Onion restaurant! It's right in the dock yard. They have great food and local brewed beer. If you buy the local beers they let you keep the mug. . . cool souvenir.
There is also a really cool glass blowing place right on the dock which gives glass blowing shows all day.
Right near the dock there is also a really nice smaller beach that has a bar and grill right on the water. I think they charge $5 during the day entrance. That also includes a beach chair for the day I believe.
Let me know if you have any questions.