Do you mean Curacao? Its a great little island, very neat and clean. Very nice beach with good snorkeling right next to the seaquarium. Great local/ crafty shopping along the waterfront. Very safe island.
My husband and I spent 10 days on Curacao for our honeymoon! (This was 10 years ago when nobody had ever heard of it.) It's awesome. There are tons of places to snorkel. We have the most amazing pictures that we took with our waterproof camera! The water is crystal clear!
Do a google search for "shore diving the ABC islands" - you'll find a great website that lists many places, with pictures, comments, etc. Be aware though that many of them are a long ride from where your ship docks and may be too expensive by taxi. We went to Playa (somewhere) on the recommendation of a taxi guy (a spot listed on that website, too) and although the beach area was quite small, there were chairs, a small dive shop, restaurant, and great snorkeling. And except for one other couple, we were the only Americans there (many Dutch and French people, and locals too) - it was great - wish I was there right now!