Vickster, welcome to Cruise-Chat and congratulations on your upcoming cruise! Be prepared to become addicted, like the rest of us, to both.
You can go on the Celebrity web site www.celebrity.com
and click on "Before Your Cruise" across the top. Then click on "Book Shore & Land Excursions." Then, if you "register" on the next page, you'll be able to see all the available excursions for your ports of call.