I learned to walk on Poipu Beach in Kauai. We travel to Hawaii at least once every two years, and as much of a second home it's become to me, I have to rave about my addiction to Cayman: THE WATER!
Okay, so that sounds almost... dumb. It's a beach! It's an island! Of course you'd love the water! And at the risk of sounding like an infomercial: But this just isn't ANY water!
The gorgeous, clichéd sparkling turquoise Caribbean waters are cliché for that perfect reason: they ARE perfect. On the very white sands of Seven Mile, you have a view of an ocean that looks like an endless pool, with some of the gentlest waves around. While I was there, I would glide into the water and just float for hours - instant water bed!
Sorry, I know, I'm lame. But this is just a liquid heaven. Warmth, glimmering beauty, friendly fish (my little brother had a fish that would NOT leave him alone - it circled him for hours. We called it Dory.), and oh, whatever your perfect vision of tropical ocean water is, you'll find it off Seven Mile Beach.
Georgetown, the quaint harbor city of the Cayman Islands, is slightly dirty, plenty tourist-y, and leaves you feeling like you've just been in a pirate-lauded port town (well, you have, technically!). It has so much charm, and yes, while the tourist part can seem, well, touristy, it doesn't take away from the place as much as others might.
Hell! You can go to Hell, too! Hell, Cayman Islands, unlike Georgetown, is the very DEFINITION of a tiny, touristy, almost pathetic place, but for posterity's sake, wouldn't you like to go to Hell? (They have bumper stickers!)
See Stingray City and the Turtle Farms as well (written about under "Activities") and ENJOY!